Mercedes CL-Class Wont Start? Here’s Quick Solutions to Most Common Problems

Introduction

As an experienced auto mechanic with over 20 years of experience, I’ve seen plenty of people battling when their Mercedes CL-Class Won’t Start. And to be frank, not being able to start your car when you need to drive is super bothersome.

But keep your chin up, you’ve come to the right place, no need to keep googling searches like “Mercedes starter problem“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this article, I’ll outline the most common reasons for why your CL-Class can’t start. I’ll detail all the typical suspects so you can diagnose what’s going on, plus what to do to resolve each specific situation. Drawing on my 20 years of personal experience, I’ll provide usable troubleshooting tips to get your Mercedes CL-Class started as quick as possible!

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To save you time, this might be the quick solution you need.

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They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

Quick Solution Alert! 🚗💡

To save you time, this might be the quick solution you need.

An online mechanic can help you solve the issue much faster, and save money doing it.

They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

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You can read on, or get instant help with your issue. We have the best online mechanics, but before asking them, we recommend asking our AI mechanic first as it’s 100% FREE.

9 out of ten times the AI mechanic is able to help you solve the problem for free, and if it’s not, you can chat with a human mechanic on the next page anyway.  Try it for free below. 

Why Won’t My a Mercedes Start?

Mercedes CL-Class wont start

Before we tackle the list of possible issues and solutions, it’s critical to first gain an understanding of the central issue. When you climb into your Mercedes CL-Class and discover “it won’t start!”, there could be a number of components causing the headaches. Maybe the engine doesn’t turn over whatsoever, or possibly it’s cranking but not firing. Or you might hear clicking when you try to start it, but sadly no ignition occurs. All these situations can signal various mechanical issues.

Common Reasons Why Your Mercedes CL-Class Won’t Start

There are a host of culprits as to why your CL-Class won’t fire up. Typical causes include a dead or weak battery, faulty alternator, starter motor issues, fuel system problems, plus electrical or wiring issues. Each of these concerns can present differently, needing specific methods of troubleshooting and fixing to get you driving again as quick as possible. All of which, we’ll delve into.

Symptoms of a Mercedes CL-Class That Won’t Start

Recognizing these red flags will lead you to the core mechanical problem. For instance, when you turn the key and you hear it clicking but no ignition, it often indicates a problem with either fuel delivery or ignition issues.

Analysis of The Reasons Why Your Mercedes CL-Class Won’t Start

The first step in fixing the no-start hassle is understanding the exact source of the problem. So let’s examine the most common causes of the CL-Class failing to start when you turn the key.

Battery Issues in a Mercedes CL-Class

car wont start but battery is good
Image Credit: MechanicAnswer.com

In the vast majority of situations, the most typical reason a Mercedes CL-Class won’t start comes down to battery troubles. Specifically, a weak or dead battery prevents the engine from turning over. The car’s battery provides the necessary electrical juice to ignite the engine and run all your electronics. Signals of a dying battery include labored or difficult cranking, dim headlights, or a battery alert symbol aglow on the dash. A battery charger can recharge a drained battery if you don’t have the help of another vehicle to jump start it, but do have an electrical socket nearby like at home.  And a portable jump starter lets you charge p the battery without another vehicle, and by the roadside without the need for an electrical socket, so you are never stuck.

Alternator Problems in a Mercedes CL-Class

car wont start alternator

The Alternator keeps the battery charged by using engine power while driving. A malfunctioning alternator can easily stop your Mercedes CL-Class from starting since it cannot recharge the battery, depleting it fully so that one day you climb into your wheels and it just can’t start. Signs of a faulty alternator may include a lit up battery or alternator caution light on your dashboard, dim headlights while idling, or a whirring noise from the engine while running.

Starter Motor Failures in a Mercedes CL-Class

car wont start wont turn over

The starter motor is key to turning the engine when you attempt to start your Mercedes. In the event of starter problems, the engine may fail to crank, preventing your CL-Class from starting. Listen out for clicking sounds when you turn the key or grinding while trying to start, which could indicate starter troubles.

Fuel System Issues in a Mercedes CL-Class

car wont start fuel filter

We’re not talking about running out of gas like a silly goose. Instead, it’s problems in the fuel system itself potentially leaving your CL-Class unable to start. Your Mercedes CL-Class uses gas to mix with air and powers the engine. So problems here like a clogged fuel filter or failing fuel pump relay may mean the engine is unable to get the fuel it requires for ignition. Fuel injectors can also get clogged over time, so try a fuel injector cleaner like Red Line to clean them out and improve starting.

Electrical System or Wiring Problems in a Mercedes CL-Class

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes that image is a joke, but I want to emphasize today’s cars depend greatly on electronics, opening up what can go wrong. Even in older models, the usual suspects include blown fuses, spark issues, damaged ignition switches, or broken sensors. Faulty wiring and electronics like these may prevent your Mercedes CL-Class from starting. Watch for your car only starting sometimes, warning lights, or failure to crank as signs of an underlying electrical problem. Diagnosing and repairing these typically requires a knowledgeable mechanic near you.

Solutions: Let’s Get Your Mercedes CL-Class Starting Again!

If you think you might know what the issue may be, it’s time to figure out the reason behind your car’s inability to start up, and then the next step is to try to fix the problem. Here’s advice for the common issues we’ve covered thus far:

How to Identify and Fix Battery Issues in a Mercedes CL-Class

car not starting but battery is fine

The first step if a battery problem is suspected for the no start is to inspect the battery terminals. Verify they are corrosion-free, secure, and correctly connected. If the terminals are in fact corroded, try cleaning them with a baking soda and water mixture.

Once you have checked the battery terminals, you can check to see if the battery is just out of charge, or worse, it’s old and weak, or dead and needs to be replaced. For this, you can charge the battery in a few different ways:

If the battery charges fully and performs as expected, the issue may be resolved. However, replacing the battery will be required if it is old, weak or dead. Otherwise, even sufficiently charging it to start your CL-Class may only provide temporary relief before it runs out of charge again in the near future. Using a multimeter or OB2 scanner to evaluate the battery’s condition can determine if it’s worth preserving or requires replacement. Suitable replacement batteries for your specific Mercedes can be found on Amazon here by entering your vehicle details to filter for the right fit and choosing a highly-rated seller.

Robby Recommends:

Portable Car Battery Jump Starter Charger - NOCO Boost Plus GB40

At Home Battery Charger - YONHAN - Fully Automatic

Jumper Cables by Energizer for Car Battery - Heavy Duty

NOCO Boost Plus GB40 1000A UltraSafe Car Battery Jump Starter

YONHAN Battery Charger Fully-Automatic

Energizer Jumper Cables for Car Battery, Heavy Duty

If charging your CL-Class’s battery fails to solve ongoing issues like frequent draining and recharging even after installing a new battery, an underlying problem likely causes the excessive drain. Professional diagnostic services would then be needed to inspect and identify the root cause. You can also consult a mechanic online through us or obtain an instant quote from a mobile mechanic.

How to Identify and Fix Alternator Problems in a Mercedes CL-Class

Car wont start replace alternator needed

If you suspect the alternator is causing your ride to have issues starting, you can test it yourself. If you can temporarily get the auto running (you may need a jump start), with the engine on, detach the positive battery terminal. It’s probably the alternator if the motor conks out soon after disconnecting the positive lead. However, be careful this test can be risky and harm sensitive electronics in your ride, so seeking advice from a trained mechanic in your area or online is best prior to trying it.

If you figure out that the alternator is the problem, it’s a case of having it replaced. I recommend consulting an online or local mechanic as they will advise you on how difficult the repair is for your specific model, and you can work out if you want to try it yourself, or with the advice of an online mechanic

If you do want to try it yourself or take it to a local garage, you can often buy the replacement parts yourself cheaper than at the garage, but you need to know what to get for your model of Mercedes CL-Class. You find all the information you need about your specific vehicle by searching online for something like “Mercedes vin accident check“, which is a purchasable report, that will give the specs for your vehicle and which parts are compatible, and then you can go get the alternator parts you need. However, an easier option is, Amazon probably has the alternator you need online, at a cheaper price, and their site easily shows which ones will go in your specific car model. Check the Amazon alternator page here

How to Identify and Fix Starter Motor Problems in a Mercedes CL-Class

starter motor issues in a ford

If you think the starter motor is the reason behind your Mercedes failing to start, be alert for a clicking noise when you turn the key. If present, but the engine does not turn over, the starter motor likely needs replacing. You can take it to a local garage and have them repair it, or repair it yourself with the help and advice from an online mechanic guiding you. 

If you need it, one of the cheapest and easiest places to get a new starter motor, for your exact vehicle model is on the Amazon here.

How to Identify and Solve Fuel System Problems in a Mercedes CL-Class

clogged fuel filter car wont start

If you think a fuel system issue might be causing the no-start, listen closely for the fuel pump noise when you turn the key to “on” before trying to turn over the car. The pump should emit a quiet humming for a few seconds. Should no such quiet hum be audible, the fuel pump could be faulty. Problematic starting, stalling, or poor throttle response may also stem from a clogged fuel filter. Both pump and filter issues normally require a professional mechanic to inspect and repair them properly, often using fuel pressure testing and specialized diagnostic equipment. Later in this article, I detail the best ways to get help from a local Mercedes mechanic near you. 

How to Fix Electrical or Wiring Problems in a Mercedes CL-Class

fuses to check when car wont start

If you think it’s an wiring issue, first examine the fuses for the ignition system, and swap out any that have blown. If your CL-Class starts after this, it was a successful, cheap fix! But if your Mercedes CL-Class refuses to start, even sometimes, the ignition switch itself could be faulty. Warning lights on the dashboard could also mean a damaged sensor. These can be complex issues needing a professional mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in a Mercedes CL-Class

As granpa used to say: “An ounce of prevention is worth a pound of cure”. Here’s how to prevent future problems starting your CL-Class:

Regular Upkeep of Your Mercedes CL-Class

Regular maintenance on car to prevent starting issues

Routine maintenance is critical to avoiding issues, including oil changes, battery checks, cleaning terminals, replacing the fuel filter as needed, and having a mechanic inspect the car routinely. If confused about maintenance for your model, consult a mechanic locally or online for guidance.

Drive Your CL-Class Regularly

drive regular to avoid car troubles

If your Mercedes CL-Class happens to sit unmoved in the garage or front yard for too long without being driven, the battery can decrease as it is not being recharged by the engine running, through the alternator. Try your best to drive your Mercedes CL-Class regularly to keep a charged battery. If you remember you have not driven your car in a while, take it for a brief spin around town to ensure there is still a charge left.

Note: Letting the battery completely run out of charge is also bad for its longevity, so try to avoid that.

Pay Attention to Warning Signs

Check Engine Control Light on a Vehicle Dashboard

If you notice any abnormal things like unusual noises, changes in driving and performance, or warning lights lit up on the dashboard, do not ignore them. These are often early signs of an issue that should be addressed ASAP before they escalate into larger problems later on. Consult with a mechanic locally or online about these problems and get advice on if they require attention.

When to Ask a Mercedes Mechanic Online

If your schedule is packed, or despite putting in real effort on your own, you still can’t get your car to start, consider consulting a Mercedes mechanic online. It delivers expert guidance in just minutes from the comfort of home, and is far less expensive than a tow and diagnosis at the local garage.

Advantages of an Online Mercedes Mechanic

Happy mechanic repairing car looking at camera

Online Mercedes mechanics can review your symptoms, past repair history, and circumstances to provide troubleshooting steps tailored to your situation. With so many Mercedes mechanics available they can help fix nearly any problem, it doesn’t if matter it’s your CL-Class that’s having issues or a Mercedes Citan won’t start, the online mechanics can help sort anything in no time. And with many household budgets tighter these days, the convenience and affordability of online mechanics help, keep your wallet happy too.

You can describe the issues you’re having, ask Mercedes mechanics endless questions, and even upload pics and videos so you can demonstrate to the mechanic what you mean. You can connect with them via online chat or voice chat, whatever you like. The Mercedes mechanic will ID the problem, recommend the best fix for your specific situation, and even guide you on basic repairs step-by-step.

If you’re seeking reassurance from a certified mechanic before purchasing expensive parts, or just pressed for time – online assistance has real benefits. Give it a try – you may be surprised just how easy and stress-free it is.

So feel free to try out our Mercedes mechanic online chat service and see for yourself!

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

When your Mercedes CL-Class won’t start, and you are unable to repair it yourself, thinking about how to get your vehicle to the garage can be a nightmare. There are options like roadside services, that come to you and can provide simple fixes to get your car moving enough again, so you can get it to a mechanic garage for proper repairs. You can also use a towing service, but these can be costly, easily into the hundreds of dollars. A much better option is the use of a mobile mechanic, who will come to you at your home, place of work, or by the roadside, and carry out repairs there and then for you, so you can get your CL-Class started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “on call mobile mechanic near me“, the best in the USA that also covers most towns is YourMechanicI have personally recommended them to countless people across the country and they always have a great experience.

Reasons I recommend them:

  • They use experienced ASE-certified mechanics
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If you would like to know more, the process to use them is this.

  1. Visit their official website here: YourMechanic
  2. Get an instant free quote for what you need
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Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Mercedes CL-Class won’t start, it can be a major inconvenience. However, understanding what might be causing the problems, being able to troubleshoot them, and knowing what actions are needed in each case, and where to find help if needed, will be a huge help. Keep in mind that regular care is vital to avoiding most car problems.

Frequently Asked Questions (FAQs) When a Mercedes CL-Class Won’t Start

Mercedes CL-Class won’t start but lights turn on?

If your Mercedes CL-Class‘s lights turn on but it still won’t start, the issue may not be related to the battery. More than likely there is a problem with the starter motor. Check to see if you hear any clicking noises when attempting to crank the key. If so, the starter motor is attempting to activate but failing. Get a mechanic check over the starter motor – it may need to be fixed or swapped out.

Mercedes CL-Class won’t start but has power?

When your Mercedes CL-Class has power (lights, radio etc work) but fails to start, there may be a fuel delivery problem. Issues like a faulty fuel pump relay could stop fuel getting to the engine. Without enough fuel, combustion can’t happen and the engine won’t start. Listen near the back seat when cranking the key – you should hear the fuel pump prime for a few seconds. If not, have a mechanic check the fuel system.

Mercedes CL-Class won’t start but battery is good?

If your Mercedes CL-Class‘s battery tests fine and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Potential culprits include a bad ignition switch, broken sensor, or wiring problems. As electrical issues can be tricky, diagnosis by a professional mechanic is best. They can accurately identify the specific electrical fault and have it repaired.

Mercedes CL-Class won’t start just clicking?

When you turn the key and there’s only a clicking noise but the engine fails to turn over, the most common cause is a faulty starter motor. The click comes from the starter solenoid trying to engage the starter motor, but the motor itself fails to spin up the engine. As the starter motor needs physical fixing or swapping out, consult with a reliable mechanic to get your Mercedes CL-Class running again.

What if my Mercedes CL-Class won’t start up?

First things first, take a deep breath and try to stay calm. Check for any odd noises, flashing lights, or changes in how it runs that could point to the issue. Chances are the culprit is one of the common problems we will talk about here. If you still can’t locate the exact issue, you’ll have to consult a trusted Mercedes mechanic locally or online.

Determine if my Mercedes CL-Class won’t start because of a bad battery?

Clues that your Mercedes’s battery is the issue are, a slow cranking engine, dim front lights, and battery warning symbols lighting up on the dash. You can also make sure the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is worn out it’s probably best to just replace it completely.

How to prevent my Mercedes CL-Class from failing to start in the future?

To prevent this frustration from repeating, regular servicing is vital. This includes oil changes, inspecting the battery and cleaning its terminals, changing out the fuel filter when required, and getting your Mercedes CL-Class evaluated by a mechanic on a regular basis. Additionally, be diligent about drive the car regularly so the battery stays charged.

Can I consult an online mechanic if my Mercedes CL-Class fails to start up?

Yes, you can. An online mechanic service like ours can offer instant professional Mercedes mechanic help and advice, without you having to leave your house. If your vehicle fails to start and is stuck in the parking area, this is especially helpful.

How can platforms like MechanicAnswer.com provide assistance if my Mercedes CL-Class won’t turn on?

We connect you with licensed Mercedes mechanics who can supply recommendations tailored to your unique situation. You can update them about your vehicle troubles, ask as many questions as needed, upload images and videos so you can fully detail the issue. The specialist auto mechanic will be able to aid, diagnose the issue, and recommend the ideal solution and walk you through it.

Interesting Mercedes CL-Class Facts

Did you know that the Mercedes CL-Class was actually the first car to feature active body control, which uses hydraulic servos to adjust the suspension in real time? It’s like having a team of tiny engineers inside your car constantly working to give you the smoothest ride possible. And get this – the CL-Class also has a night vision system that can detect pedestrians up to 300 feet away in the dark. It’s like having superhuman vision while you’re behind the wheel. Plus, with a top speed of 155 mph and a 0-60 time of just 4.5 seconds, the CL-Class is no slouch when it comes to performance. So if you’re feeling down about your car trouble, just remember all the amazing technology and power that’s waiting for you once you get back on the road.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

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2. Chat with a Human Mechanic Online
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  • Real human ASE-certified mechanics available 24/7

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

Where Can I Find My VIN?

Your vehicle’s unique Vehicle Identification Number (VIN) can be found on the title document, the vehicle registration, and the insurance policy. It is a series letters and numbers like this as example: WAUGC0896JA235262. The VIN can also be located on the following locations on the vehicle itself:

how to find VIN on vehicle