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

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Intro

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

But don’t lose hope, you’ve come to the right place, no need to keep googling searches like “reason why Mercedes won’t start“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this guide, I’ll explain the frequent causes for why your E-Class refuses to start. I’ll cover all the typical culprits so you can identify what’s going on, plus what to do to fix each specific problem. Drawing on my 20 years of training and on the job experience, I’ll provide usable troubleshooting tips to get your Mercedes E-Class fire up and moving ASAP!

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Why Won’t My a Mercedes Start?

Mercedes E-Class wont start

Before we tackle the laundry list of possible faults and fixes, it’s critical to first gain an understanding of the core problem. When you hop in your Mercedes E-Class and discover “it won’t start!”, there could be multiple components causing the difficulties. Perhaps the engine isn’t cranking at all, or possibly it’s turning over partially yet not igniting. Or you might notice clicking sounds when you try to start it, but ultimately nothing happens. Each scenario can signal various mechanical issues.

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

There are a host of reasons why your E-Class won’t start. Typical causes include a dead or weak battery, faulty alternator, starter motor failures, fuel system snags, plus electrical or wiring issues. Every one of these issues can show up 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 E-Class That Won’t Start

Recognizing these warning signs will lead you to the core mechanical problem. For instance, when you turn the key and you hear it turning over yet no start up, it often signifies a problem with either fuel delivery or ignition issues.

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

The first step in remedying the no-start headache is understanding the exact source of the problem. So let’s examine the most common reasons behind the E-Class failing to start when you turn the key.

Battery Issues in a Mercedes E-Class

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

In the majority of cases, the most frequent reason a Mercedes E-Class won’t start comes down to issues with the battery. Specifically, a weak or dead battery prevents the engine from cranking. The car’s battery supplies the required power to start the engine and activate all your vehicle’s electrical components. Signals of a struggling battery include sluggish or strained cranking, dim headlights, or a warning light illuminated on the dash. A battery charger can recharge a dead 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 E-Class

car wont start alternator

The Alternator keeps the battery juiced up by harnessing engine power while driving. A malfunctioning alternator can easily prevent your Mercedes E-Class from starting since it fails to recharge the battery, depleting it fully so that one day you hop in your ride and it just can’t start. Symptoms of a faulty alternator can be a lit up battery or alternator caution light on its dashboard, faint headlights while idling, or a whirring noise from the engine while running.

Starter Motor Failures in a Mercedes E-Class

car wont start wont turn over

The starter is crucial for turning over the engine when you turn the key to start your Mercedes. Should the starter fail, the engine might not crank, keeping your E-Class from starting. Be on the alert for clicking sounds when you turn the key or grinding as you try to start it, potentially signaling starter troubles.

Fuel System Issues in a Mercedes E-Class

car wont start fuel filter

We’re not talking about running out of gas like a silly goose. Instead, it’s issues with the fuel system itself that could leave your E-Class unable to drive. Your car uses gas uses gas to combine with oxygen and runs the engine. Issues in fuel delivery like a clogged fuel filter or damaged fuel pump relay may mean the engine is unable to get the fuel it needs to start. Fuel injectors can also get clogged over time, so consider a fuel injector cleaner like Red Line to clear any blockages and improve starting.

Electrical System or Wiring Problems in a Mercedes E-Class

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes that image is a joke, but I want to emphasize modern cars now rely heavily on electronics, opening up what can go wrong. With older cars, the usual suspects include blown fuses, spark issues, damaged ignition switches, or broken sensors. Faulty wiring and electronics like these may prevent your vehicle from starting. Pay attention to intermittent starting, warning lights, or failure to crank as hints of an underlying electrical issue. Diagnosing and repairing these often needs a skilled mechanic near you.

Solutions: Let’s Get Your Mercedes E-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 failure to start, and then the logical next move is to try to fix the problem. Here are some tips for typical problems we’ve talked about already:

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

car not starting but battery is fine

The first step if a battery issue is suspected for the no start is to check the battery terminals. Make sure they are corrosion-free, tight, and properly connected. If the terminals are in fact corroded, try scrubbing them with a sodium bicarbonate(baking soda) and water solution.

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 aged, dead or lacks capacity. Otherwise, even sufficiently charging it to start your E-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 swapping out. 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 E-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 E-Class

Car wont start replace alternator needed

If you think the alternator is the reason your Mercedes E-Class won’t start, a test can confirm. If you can temporarily get the auto running (you may need a jump start), and while the engine is running, disconnect the positive terminal of your car’s battery. It’s probably the alternator if the engine dies soon after disconnecting the positive lead. Keep in mind though this test can be dangerous and mess up delicate electronics in your wheels, so it’s best to consult with a professional mechanic in your town or online first since this test risks damaging the delicate electronic gizmos in your Mercedesvehicle.

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 E-Class. You find all the information you need about your specific vehicle by searching online for something like “run Mercedes 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 E-Class

starter motor issues in a ford

If you believe the starter motor might be causing your Mercedes E-Class to not fire up, listen closely for a clicking sound when you try and start it. If heard, but the engine does not turn over, the starter motor likely needs replacement. 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 E-Class

clogged fuel filter car wont start

If you think a fuel system malfunction might be to blame for the no-start, tune your ears for the fuel pump hum when you flip the key to “on” before trying to turn over the car. The pump should emit a faint humming for a few seconds. If you can’t hear that noise, the fuel pump could be faulty. Problematic starting, stalling, or lagging acceleration may also stem from a clogged fuel filter. Filter and pump issues usually need a skilled mechanic to diagnose and fix 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 E-Class

fuses to check when car wont start

If you suspect it’s an wiring issue, first inspect the fuses for the ignition system, and replace any that have blown. If your E-Class starts after this, it was a successful, cheap repair! However, if it still won’t start, even sometimes, the ignition switch itself could be the cause of the issue. Warning lights on the dashboard could also mean a faulty component. These can be complex problems needing a qualified mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in a Mercedes E-Class

As my dad used to say: “An ounce of prevention is worth a pound of cure”. Here’s how to prevent future issues starting your E-Class:

Regular Maintenance of Your Mercedes E-Class

Regular maintenance on car to prevent starting issues

Regular maintenance is key to avoiding issues, including oil changes, checking the battery, cleaning terminals, replacing the fuel filter as needed, and having a mechanic check over the car routinely. If unsure about maintenance for your model, ask a mechanic locally or online for guidance.

Drive Your E-Class Frequently

drive regular to avoid car troubles

If your Mercedes E-Class happens to sit parked in the garage or front yard for extended times without being driven, the battery can decrease as it is not being recharged by the engine running, through the alternator. Try your best to use your vehicle regularly to keep a charged battery. If you remember you haven’t driven your car in a while, take it for a quick drive around town to ensure there is still a charge left.

Note: Letting the battery fully 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 weird things like unusual sounds, 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 you have limited time available, 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 quick professional advice 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

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 E-Class that’s having issues or a Mercedes CLS-klasse AMG 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 problems you’re having, ask Mercedes mechanics endless questions, and even upload images and videos so you can demonstrate to the expert what you mean. You can talk to them via online chat or phone call, whichever you prefer. The Mercedes specialist will diagnose the issue, advise the best fix for your specific situation, and even walk you through basic maintenance 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 to see firsthand how convenient fixing problems can be.

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

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

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

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “mobile mechanics 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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  • 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
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Super easy, super reliable, super convenient, and highly recommended.

Conclusion

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

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

Mercedes E-Class won’t start but lights come on?

If your Mercedes E-Class‘s lights illuminate but it still won’t start, the issue is likely not related to the battery. More than likely there is a problem with the engine starter. Investigate if you hear any clicking noises when trying to turn the key. If so, the starter motor is attempting to activate but failing. Have a mechanic check over the starter motor – it may need to be repaired or replaced.

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

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

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

If your Mercedes E-Class‘s battery checks out OK and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Possible issues 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 E-Class won’t start just clicking?

When you turn the key and there’s only a clicking noise but the engine doesn’t crank, the most common cause is a faulty starter motor. The click comes from the starter solenoid attempting to activate 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 E-Class running again.

What if my Mercedes E-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’ll 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 E-Class won’t start because of a bad battery?

Clues that your Mercedes’s battery is the issue are, a slow cranking engine, dim headlights, and battery alerts lighting up on the dash. 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 fully.

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

To prevent this frustration from repeating, regular upkeep is essential. This includes oil changes, testing the battery and cleaning its terminals, changing out the fuel filter when needed, and getting your Mercedes E-Class evaluated by a mechanic frequently. Also, be diligent about drive the car frequently so the battery stays charged.

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

Yes, you can. An online mechanic service like ours can offer instant skilled Mercedes mechanic aid and recommendations, without you having to leave your residence. This is especially useful if your Mercedes E-Class is unable to start and is stuck in the parking area,.

In what ways can services like MechanicAnswer.com be of service if my Mercedes E-Class fails to start?

We link you with licensed Mercedes specialists who can offer proposals tailored to your unique situation. You can inform them about your vehicle issues, ask as many questions as needed, and even submit images and videos so you can comprehensively demonstrate the problem. The specialist auto mechanic will be capable to aid, identify the problem, and recommend the ideal solution and talk you through it.

Interesting Mercedes E-Class Facts

Did you know that the Mercedes E-Class is equipped with an ECO Start/Stop system that automatically shuts off the engine when the vehicle comes to a stop, helping to conserve fuel and reduce emissions? It’s like the car has a mind of its own! And get this, the E-Class also comes with a Car-to-X Communication system that allows it to communicate with other vehicles on the road to provide real-time traffic updates and warnings. It’s like having a built-in network of helpful friends guiding you on your journey. Plus, the E-Class has a top speed of 130 mph, so you know it’s got some serious power under the hood. It’s no wonder you’re itching to get it started and hit the road!

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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