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

Intro

As a certified car mechanic with over 20 years of hands on experience, I’ve seen plenty of people battling when their Mercedes CLA-Class Won’t Start. And let’s be honest, not being able to start your car when you need to drive is super annoying.

But don’t lose hope, you’ve come to the right place, no need to keep googling searches like “causes of Mercedes not starting“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this guide, I’ll outline the frequent explanations for why your CLA-Class can’t start. I’ll detail all the routine culprits so you can pinpoint what’s going on, plus what to do to fix each specific problem. Drawing on my 20 years of personal experience, I’ll offer actionable troubleshooting tips to get your Mercedes CLA-Class starting again as soon as possible!

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So Why Won’t My a Mercedes Start?

Mercedes CLA-Class wont start

Before we dive into the list of possible issues and solutions, it’s key to first get on the same page of the core problem. When you climb into your Mercedes CLA-Class and realize “it won’t start!”, there could be several things causing the troubles. Maybe the engine doesn’t turn over whatsoever, or maybe it’s turning over partially yet not igniting. Or you might hear clicking when you try to start it, but sadly no ignition occurs. Each scenario can indicate various mechanical issues.

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

There are many culprits as to why your CLA-Class won’t start up. The usual suspects cover a weak or drained battery, broken alternator, starter motor issues, fuel system snags, plus electrical or wiring malfunctions. Each of these issues can present differently, requiring specific methods of troubleshooting and fixing to get you back on the open road as quick as possible. All of which, we’ll delve into.

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

Spotting these symptoms will help uncover the underlying mechanical problem. Take for example, 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 CLA-Class Won’t Start

The initial move in fixing the no-start nuisance is understanding the specific source of the issue. So let’s examine the most frequent causes of the CLA-Class refusing to start when you turn the key.

Car Battery Issues Preventing Your Mercedes CLA-Class From Starting

Car wont start battery is good

In the vast majority of situations, the most frequent reason a Mercedes CLA-Class won’t start comes down to battery troubles. Specifically, a drained or weak battery prevents the engine from cranking. The car’s battery provides the necessary electrical juice to ignite the engine and energize all your vehicle’s electrical components. Signals of a struggling battery include sluggish or strained cranking, faint 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 Can Prevent Your Mercedes CLA-Class Starting

car wont start alternator

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

Starter Motor Failures in a Mercedes CLA-Class

car wont start wont turn over

The starter motor is key to turning the engine when you attempt to start your Mercedes. Should the starter fail, the engine may fail to crank, keeping your CLA-Class from starting. Pay attention to clicking sounds when you turn the key or grinding during cranking, potentially signaling starter issues.

Fuel System Issues Can Prevent a Mercedes CLA-Class From Starting

car wont start fuel filter

We’re not talking about running out of gas like a silly goose. Rather, it’s problems in the fuel system itself that could leave your CLA-Class unable to drive. Your Mercedes CLA-Class uses gas to mix with air and runs the engine. Issues in fuel delivery 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 CLA-Class Can Prevent it From Starting

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, increasing the number of things that can go wrong. Even in older Mercedes’s, the usual suspects include blown fuses, ignition problems, faulty ignition switches, or broken sensors. Electrical issues and electronics like these can all prevent your vehicle from starting. Watch for your car only starting sometimes, warning lights, or failure to crank as hints of an underlying electrical problem. Diagnosing and repairing these typically requires a qualified mechanic near you.

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

If you think you might know what the issue may be, it’s time to figure out the cause of your car’s inability to start up, and then the logical next move is to try to repair the problem. Here’s advice for the frequent issues we’ve discussed up to this point:

How to Identify and Fix Battery Issues in a Mercedes CLA-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. Ensure they are clean, tight, and correctly connected. Should you find corrosion or gunk buildup on the terminals, a baking soda and water solution can help clean them.

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, if the battery has aged or lacks capacity, replacing it will be necessary. Otherwise, even sufficiently charging it to start your CLA-Class may only provide temporary relief before it likely runs out of power again soon. 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 CLA-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 CLA-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 vehicle running (you may need a jump start), and while it’s running, disconnect the positive terminal of your car’s battery. If the auto dies right quickly after that, it’s likely a bad alternator. However, be careful this test can be risky and damage delicate electronics in your ride, so chatting with a skilled mechanic in your area or online is best before 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 CLA-Class. You find all the information you need about your specific vehicle by searching online for something like “title check Mercedes by vin“, 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 CLA-Class

starter motor issues in a ford

If you wonder if the starter motor is the root cause for your CLA-Class failing to start, listen for a clicking noise when you turn the ignition key. If present, but the engine does not turn over, the starter motor likely needs replaced. 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 CLA-Class

clogged fuel filter car wont start

If you think a fuel system issue might be to blame for the no-start, listen closely for the fuel pump noise when you flip the key to “on” before trying to turn over the car. The pump should make a quiet humming for a few seconds. If such a noise is not heard, the fuel pump could be faulty. Problematic starting, stalling, or poor throttle response may also come from a problematic or clogged fuel filter. Both pump and filter issues usually need a skilled mechanic to inspect and repair them properly, often using fuel pressure testing and precise diagnostic gear. Later in this article, I detail the best ways to get help from a local Mercedes mechanic near you. 

How to Repair Electrical or Wiring Issues in a Mercedes CLA-Class

fuses to check when car wont start

If you suspect it’s an wiring problem, first examine the fuses for the ignition system, and swap out any that have blown. If your CLA-Class starts after this, it was an effective, inexpensive repair! However, if it still won’t start, even sometimes, the ignition switch itself could be problematic. Dash lights on the dashboard could also mean a faulty sensor. These can be complex issues needing a qualified mechanic to diagnose and properly repair (see below advice on local mechanics).

Preventive Steps

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

Regular Upkeep of Your Mercedes CLA-Class

Regular maintenance on car to prevent starting issues

Routine maintenance is key to avoiding issues, including oil changes, battery checks, cleaning terminals, replacing the fuel filter as needed, and having a mechanic examine the vehicle regularly. If confused about maintenance for your model, ask a mechanic locally or online for guidance.

Drive Your CLA-Class Regularly

drive regular to avoid car troubles

If your Mercedes CLA-Class happens to sit parked in your garage or front yard for extended times without being driven, the battery can reduce as it is not being charged up by the engine running, through the alternator. Try your best to drive your Mercedes CLA-Class regularly to keep a charged battery. If you remember you haven’t 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 entirely run out of charge is also bad for its longevity, so try to avoid that.

Take Notice Of Warning Signs

Check Engine Control Light on a Vehicle Dashboard

If you notice any weird 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 you gave fixing the no start yourself an honest effort but with no luck, consider consulting a Mercedes mechanic online. It delivers quick professional advice from the comfort of your living room, and is far less expensive than a tow and diagnosis at the local garage.

Benefits of an Online Mercedes Mechanic

Happy mechanic repairing car looking at camera

By detailing what you’ve already tried and sharing specifics on the no-start issue, online mechanics can then offer a custom action plan to help get your car started again. With so many Mercedes mechanics available they can help fix nearly any problem, it doesn’t if matter it’s your CLA-Class that’s having issues or a Mercedes CL-Class won’t start, the online mechanics can help sort anything in no time. And with many household budgets tighter these days, an online mechanic provides instant affordable help when you need it most, 24/7.

You can explain the issues you’re having, ask Mercedes mechanics unlimited questions, and even upload pics and videos so you can demonstrate to the mechanic what you mean. You can talk to them via instant messenger or phone call, whatever you like. The Mercedes mechanic will ID the issue, advise the top solution for your specific situation, and even walk you through basic maintenance step-by-step.

Whether you want an expert second opinion or are simply short on time, online repairs assistance is there when you need it. Give it a try – you may be surprised just how easy and stress-free it is.

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

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

When your Mercedes CLA-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 CLA-Class started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “traveling 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
  • They come to you, which is super convenient
  • You see the price upfront, no surprises or hidden fees
  • Low Cost compared to regular garages

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
  3. Book a time and place for the mechanic to come to you
  4. The mechanic will arrive in a fully stocked repair van and repair it right in front of you
  5. Pay when the job is completed.

Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Mercedes CLA-Class won’t start, it can be a major inconvenience. However, grasping what might be triggering the problems, being able to diagnose them, and knowing what steps are needed in each case, and where to find help if necessary, will be a huge help. Remember that routine maintenance is vital to preventing most car issues.

Frequently Asked Questions (FAQs)

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

First things first, take a deep breath and don’t panic. Look 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 ask for help from a trusted Mercedes mechanic locally or online.

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

Clues that your Mercedes’s battery is the issue include, a slow cranking engine, dim headlights, and battery warning symbols lighting up on the dash. Also make sure the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is exhausted it’s probably best to just replace it completely.

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

To prevent this frustration from happening again, scheduled upkeep is crucial. This includes oil changes, checking the battery and cleaning its terminals, changing out the fuel filter when needed, and getting your Mercedes CLA-Class evaluated by a mechanic routinely. Also, make sure to drive the car regularly so the battery stays charged.

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

Yes, you can. An online mechanic service like ours can offer instant expert Mercedes mechanic help and recommendations, without you having to leave your house. {This is particularly useful if your Mercedes CLA-Class is unable to start and is stuck in the driveway,.

How can websites like MechanicAnswer.com lend a hand if my Mercedes CLA-Class isn’t starting?

We pair you with qualified Mercedes mechanics who can supply proposals tailored to your individual situation. You can inform them about your auto issues, ask as many questions as needed, upload videos or pictures so you can comprehensively demonstrate the problem. The mechanic will be able to help, identify the fault, and put forward the best solution and talk you through it.

Interesting Mercedes CLA-Class Facts

Did you know that the Mercedes CLA-Class is actually based on the same platform as the A-Class hatchback? It’s like they took the practicality and efficiency of the A-Class and gave it a sleek and sporty makeover. And get this – the CLA-Class has a drag coefficient of just 0.23, making it one of the most aerodynamic production cars in the world! It’s like driving a futuristic spaceship on the road. Plus, the interior is packed with high-tech features like the MBUX infotainment system, which uses artificial intelligence to learn your preferences and make driving even more enjoyable. It’s no wonder you’re obsessed with your CLA-Class – it’s a true marvel of engineering and design!

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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.

Choose Your Mechanic

1. Chat with A.I. Mechanic (Robot Robby)
  • Free 7-day trial
  • A.I. Mechanic that is trained by our human mechanic writers. As helpful as a human mechanic for expert advice, troubleshooting, and repair guidance.
2. Chat with a Human Mechanic Online
  • Join for just $5, and $39/month. Cancel anytime
  • 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