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

Introduction

As an experienced car mechanic with over two decades of experience, I’ve seen plenty of people struggling when their Mercedes GLC-Class Won’t Start. And let’s be honest, not being able to start your car when you need to drive is incredibly annoying.

But don’t worry, you’ve come to the right place, no need to keep googling searches like “reason why a 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 article, I’ll walk you through the usual causes for why your GLC-Class fails to start. I’ll discuss all the routine suspects so you can diagnose what’s causing issues, plus what to do to fix each specific problem. Drawing on my 20 years of training and on the job experience, I’ll offer actionable diagnostic pointers to get your Mercedes GLC-Class up and moving as soon as possible!

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Why Won’t My a Mercedes Start?

Mercedes GLC-Class wont start

Before we dive into the list of possible faults and fixes, it’s key to first get on the same page of the central issue. When you climb into your Mercedes GLC-Class and discover “it won’t start!”, there could be several components causing the troubles. Maybe the engine doesn’t turn over whatsoever, or possibly it’s cranking but not firing. Or you might notice clicking sounds when you try to start it, but ultimately nothing happens. Each scenario can signal different problems under the hood.

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

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

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

Spotting these symptoms will guide you toward the underlying cause. For instance, when you turn the key or press the start button and you hear it clicking but no ignition, it often indicates a fuel or ignition issue.

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

The initial move in solving the no-start hassle is identifying the exact origin of the problem. So let’s explore the most frequent causes of the GLC-Class failing to start when you turn the key.

Battery Issues in a Mercedes GLC-Class

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

In the vast majority of situations, the most frequent reason a Mercedes GLC-Class won’t start comes down to battery troubles. Specifically, a drained or weak battery prevents the engine from cranking. The car’s battery supplies the required power to start the engine and energize all your vehicle’s electrical components. Signals of a dying battery include labored or difficult 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 GLC-Class

car wont start alternator

The Alternator keeps the battery juiced up by harnessing engine power while driving. A worn out alternator can easily prevent your Mercedes GLC-Class from starting since it fails to recharge the battery, depleting it fully so that one day you climb into your wheels and it just can’t start. Clues of a problematic alternator can be an illuminated battery or alternator warning symbol on your dashboard, faint headlights while idling, or a grinding noise from the engine while running.

Starter Motor Failures in a Mercedes GLC-Class

car wont start wont turn over

The starter motor is key to cranking the engine when you try and start up your Mercedes. If the starter is faulty, the engine might not crank, keeping your GLC-Class from starting. Listen out for clicking noises when you turn the key or grinding while trying to start, potentially signaling starter issues.

Fuel System Issues in a Mercedes GLC-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 that could leave your GLC-Class unable to start. 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 lacking the fuel it needs to start. Fuel injectors can also get clogged over time, so consider a fuel injector cleaner like Red Line to clean them out and improve starting.

Electrical System or Wiring Problems in a Mercedes GLC-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, expanding the number of things that can go wrong. Even in older vehicles, the usual suspects include blown fuses, ignition problems, faulty ignition switches, or non-working sensors. Electrical issues and electronics like these may prevent your car from starting. Be on the lookout for your car only starting sometimes, dashboard alerts, or failure to crank as signs of an underlying electrical issue. Diagnosing and repairing these often needs an experienced mechanic near you.

Solutions: Let’s Get Your Mercedes GLC-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 starting failure, and then the logical next move is to try to repair the problem. Here are some tips for common issues we’ve covered thus far:

How to Identify and Fix Battery Issues in a Mercedes GLC-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 clean, secure, 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, replacing the battery will be required if it is aged, dead or lacks capacity. Otherwise, even sufficiently charging it to start your GLC-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 GLC-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 GLC-Class

Car wont start replace alternator needed

If you suspect the alternator is causing your car to have trouble 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 car dies pretty quickly after that, it’s likely a bad alternator. Keep in mind though this test can be dangerous and mess up delicate electronics in your wheels, so it’s best to talk to an experienced mechanic in your town or online first since this test risks harming the delicate electronic gizmos in your Mercedes GLC-Class.

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 GLC-Class. You find all the information you need about your specific vehicle by searching online for something like “vin on Mercedes“, 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 GLC-Class

starter motor issues in a ford

If you suspect the starter motor is the reason behind your Mercedes struggling to start, be alert for a clicking sound when you turn the key. If present, but the engine does not turn over, the starter motor likely requires 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 GLC-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 noise when you turn the key to “on” before attempting to start the car. The pump should emit a faint humming for a few seconds. Should no such quiet hum be audible, the fuel pump could be faulty. Difficult starting, stalling, or lagging acceleration may also stem from a blocked fuel filter. Both pump and filter issues normally 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 GLC-Class

fuses to check when car wont start

If you think it’s an electrical problem, first examine the fuses for the ignition system, and replace any that have blown. If your GLC-Class starts after this, it was a successful, inexpensive fix! However, if it still won’t start, even sometimes, the ignition switch itself could be faulty. Dash lights on the dashboard could also mean a faulty component. These can be complex problems needing a qualified mechanic to identify and fix (see below advice on local mechanics).

How to Prevent Starting Issues in a Mercedes GLC-Class

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

Routine Maintenance of Your Mercedes GLC-Class

Regular maintenance on car to prevent starting issues

Routine maintenance is key to avoiding issues, including oil changes, checking the battery, cleaning terminals, replacing the fuel filter as needed, and having a mechanic inspect the car regularly. If unsure about maintenance for your model, consult a mechanic locally or online for clarification.

Drive Your GLC-Class Frequently

drive regular to avoid car troubles

If your Mercedes GLC-Class happens to sit motionless 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 drive your vehicle regularly to keep a charged battery. If you remember you haven’t driven your car in a while, take it for a short spin around town to ensure there is still a charge left.

Note: Letting the battery fully drain 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 expert guidance in just minutes from the comfort of your living room, 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 GLC-Class that’s having issues or a Mercedes GLC Coupe 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 describe the problems you’re having, ask Mercedes mechanics endless questions, and even submit images and videos so you can show the expert what you mean. You can talk to them via online chat or phone call, whatever you like. The Mercedes mechanic will ID the problem, advise the best fix for your particular case, and even guide you on 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 talk to a Mercedes mechanic for free service and see for yourself!

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

When your Mercedes GLC-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 GLC-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“, 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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Conclusion

In short, when your Mercedes GLC-Class won’t start, it can be a total bummer. However, understanding 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. Keep in mind that routine care is key to preventing most vehicle problems.

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

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

If your Mercedes GLC-Class‘s lights turn on but it still won’t start, the issue is likely not related to the battery. It’s highly possible there is a problem with the engine starter. Investigate 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 GLC-Class won’t start but has power?

When your Mercedes GLC-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 prevent 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, get a mechanic check the fuel system.

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

If your Mercedes GLC-Class‘s battery tests fine 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 correctly pinpoint the specific electrical fault and have it repaired.

Mercedes GLC-Class won’t start just clicking?

When you turn the key and just hear clicking but the engine fails to turn over, 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 mechanical repair or replacing, seek help from a reliable mechanic to get your Mercedes GLC-Class running again.

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

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

Determine if my Mercedes GLC-Class won’t start because of the battery?

Signs that your Mercedes’s battery is the issue are, a slow cranking engine, dim headlights, and battery warning symbols lighting up on the dash. You can also check that the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is exhausted it’s probably best to just replace it fully.

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

To prevent this hassle from reoccuring, scheduled maintenance is crucial. This includes oil changes, checking the battery and cleaning its terminals, replacing the fuel filter when necessary, and getting your Mercedes GLC-Class inspected by a mechanic on a regular basis. Also, be diligent about drive the car regularly so the battery stays charged.

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

Yes, you can. An online mechanic service like ours can offer instant skilled Mercedes mechanic assistance and advice, without you having to leave your home. This is particularly useful if your Mercedes GLC-Class is unable to start and is immobile in the parking area,.

In what ways can websites like MechanicAnswer.com provide assistance if my Mercedes GLC-Class won’t turn on?

We link you with certified Mercedes technicians who can provide proposals tailored to your exact predicament. You can update them about your vehicle issues, ask as many questions as needed, upload images and videos so you can comprehensively demonstrate the problem. The specialist auto mechanic will be able to help, diagnose the problem, and propose the best remedy and guide you through it.

Interesting Mercedes GLC-Class Facts

Did you know that the Mercedes GLC-Class comes with an optional air suspension system that can adjust the ride height and firmness based on driving conditions? It’s like the car has a mind of its own, constantly adapting to give you the smoothest ride possible. And get this – the GLC-Class also offers a “Carwash” mode that raises the suspension to make it easier to clean the undercarriage. How cool is that? Plus, with its advanced driver assistance features like adaptive cruise control and lane-keeping assist, this car practically drives itself. It’s like having your own personal chauffeur! No wonder you’re itching to get back behind the wheel.

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  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.

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