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

Intro

As a skilled auto mechanic with over two decades of hands on experience, I’ve seen plenty of people battling when their Mercedes GL-Class Won’t Start. And to be frank, not being able to start your car when you need to drive is extremely annoying.

But don’t lose hope, you’ve come to the right place, no need to keep googling searches like “Mercedes starting problems“, 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 GL-Class can’t start. I’ll cover all the routine culprits so you can identify what’s happening, plus what to do to fix each particular problem. Drawing on my 20 years of personal experience, I’ll provide actionable troubleshooting tips to get your Mercedes GL-Class up and running as quick as possible!

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Why Won’t My a Mercedes Start?

Mercedes GL-Class wont start

Before we tackle the list of possible faults and fixes, it’s key to first gain an understanding of the central issue. When you hop in your Mercedes GL-Class and realize “it won’t start!”, there could be several 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 sadly no ignition occurs. Each scenario can signal different problems under the hood.

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

There are many culprits as to why your GL-Class won’t turn on. Typical causes include a dead or weak battery, faulty alternator, starter motor issues, fuel system problems, plus electrical or wiring issues. Each of these issues can present differently, requiring specific methods of troubleshooting and fixing to get you driving again ASAP. All of which, we’ll delve into.

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

Spotting these symptoms will guide you toward the core cause. For instance, when you turn the key and you hear it clicking but no ignition, it often signifies a problem with either fuel delivery or ignition issues.

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

The initial move in fixing the no-start headache is understanding the precise cause of the issue. So let’s take a closer look at the most common explanations for the GL-Class struggling to start when you turn the key.

Battery Issues in a Mercedes GL-Class

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

In the vast majority of situations, the most common reason a Mercedes GL-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 run all your vehicle’s electrical components. Signs of a failing battery entail labored or difficult cranking, faint headlights, or a warning light illuminated 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 GL-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 GL-Class from starting since it fails to recharge the battery, draining it completely so that one day you climb into your ride and it refuses to start up. Symptoms of a problematic alternator can be a lit up battery or alternator warning symbol on its dash, dim headlights while idling, or a grinding noise from the engine while running.

Starter Motor Failures in a Mercedes GL-Class

car wont start wont turn over

The starter motor is key to turning over the engine when you attempt to start your Mercedes. If the starter is faulty, the engine can’t crank, preventing your GL-Class from starting. Be on the alert for clicking sounds when you turn the key or grinding during cranking, which could indicate starter issues.

Fuel System Issues in a Mercedes GL-Class

car wont start fuel filter

This isn’t about running out of gas like a silly goose. Instead, it’s issues with the fuel system itself potentially leaving your GL-Class unable to start. Your Mercedes GL-Class uses fuel to combine with oxygen and powers the engine. So problems here like a clogged fuel filter or damaged 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 consider a fuel injector cleaner like Red Line to clean them out and improve starting.

Electrical System or Wiring Problems in a Mercedes GL-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 cars, common culprits include blown fuses, spark issues, broken ignition switches, or broken sensors. Faulty wiring and electronics like these can all prevent your Mercedes GL-Class from starting. Be on the lookout for intermittent starting, dashboard alerts, or failure to crank as hints of an underlying electrical problem. Diagnosing and repairing these typically requires a knowledgeable mechanic near you.

Solutions: Let’s Get Your Mercedes GL-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 mend the issue. Here’s advice for the typical problems we’ve talked about already:

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

car not starting but battery is fine

The first step if a battery problem is suspected for the no start is to check the battery terminals. Verify they are clean, secure, and properly connected. If the terminals are in fact dirty, try scrubbing 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, if the battery has aged or lacks capacity, replacing it will be necessary. Otherwise, even sufficiently charging it to start your GL-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 GL-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 GL-Class

Car wont start replace alternator needed

If you think the alternator is the reason your Mercedes GL-Class won’t start, a test can confirm. If you can temporarily get the vehicle running (you may need a jump start), and while the engine is running, disconnect the positive terminal of the battery. If the auto dies right quickly after that, it’s likely a bad alternator. However, be careful this test can be risky and mess up sensitive electronics in your wheels, so it’s best to talk to a professional mechanic locally 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 GL-Class. You find all the information you need about your specific vehicle by searching online for something like “Mercedes vin checker“, 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 GL-Class

starter motor issues in a ford

If you believe the starter motor might be causing your Mercedes GL-Class to not start up, pay attention for a clicking sound when you try and start it. If heard, but the engine does not turn over, the starter motor likely requires 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 GL-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 attempting to start the car. The pump should make a faint humming for a few seconds. If such a noise is not heard, the fuel pump could be faulty. Difficult starting, stalling, or poor throttle response may also result from a problematic or clogged fuel filter. Both pump and filter issues normally need a skilled mechanic to diagnose and fix them properly, often involving fuel pressure testing and precise diagnostic equipment. 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 Problems in a Mercedes GL-Class

fuses to check when car wont start

If you suspect it’s an wiring problem, first inspect the fuses for the ignition system, and replace any that have blown. If your GL-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 faulty. Dash lights on the dashboard could additionally mean a damaged sensor. These can be intricate problems needing a qualified mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in a Mercedes GL-Class

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

Regular Upkeep of Your Mercedes GL-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 inspect the car regularly. If unsure about maintenance for your model, consult a mechanic locally or online for guidance.

Drive Your GL-Class Frequently

drive regular to avoid car troubles

If your Mercedes GL-Class happens to sit unmoved in your garage or front yard for extended times without being driven, the battery can weaken as it is not being recharged by the engine running, through the alternator. Try your best to use your car 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 fully 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 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 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 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 GL-Class that’s having issues or a Mercedes G-klasse AMG 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 submit photos and videos so you can demonstrate to the mechanic what you mean. You can chat with them via instant messenger or voice chat, whichever you prefer. The Mercedes mechanic will ID the problem, advise the best fix for your particular case, and even walk you through basic repairs 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 Mercedes expert live chat free service and see for yourself!

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

When your Mercedes GL-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 GL-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 car repair service 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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  • 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
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Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Mercedes GL-Class doesn’t turn over, it can be a total bummer. However, understanding what might be triggering the issues, being able to troubleshoot them, and knowing what steps are required in each case, and where to get help if needed, will be a huge help. Keep in mind that regular care is key to preventing most vehicle issues.

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

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

If your Mercedes GL-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 engine starter. Investigate if you hear any clicking noises when attempting to crank the key. If so, the starter motor is trying to engage but failing. Have a mechanic examine the starter motor – it may need to be repaired or replaced.

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

When your Mercedes GL-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 turning the key – you should hear the fuel pump prime for a few seconds. If not, have a mechanic check the fuel system.

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

If your Mercedes GL-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 correctly pinpoint the specific electrical fault and have it repaired.

Mercedes GL-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 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 GL-Class running again.

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

First things first, take a deep breath and try to stay calm. Look 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 pinpoint the exact issue, you’ll have to consult a trusted Mercedes mechanic locally or online.

How do I know if my Mercedes GL-Class won’t start because of the battery?

Clues that your Mercedes’s battery is the issue include, a slow cranking engine, dim front lights, 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 worn out it’s probably best to just replace it entirely.

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

To prevent this nuisance from repeating, regular maintenance is essential. This includes oil changes, testing the battery and scrubbing its terminals, changing out the fuel filter when needed, and getting your Mercedes GL-Class inspected by a mechanic on a regular basis. Also, remember to drive the car often so the battery stays charged.

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

Yes, you can. An online mechanic service like ours can offer immediate expert Mercedes mechanic help and recommendations, without you having to leave your house. If your vehicle fails to start and is stuck in the driveway, this is especially beneficial.

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

We connect you with certified Mercedes technicians who can supply proposals tailored to your individual situation. You can update them about your auto problems, ask as many questions as needed, upload images and videos so you can show in detail the problem. The specialist auto mechanic will be capable to assist, diagnose the fault, and propose the best remedy and walk you through it.

Interesting Mercedes GL-Class Facts

Did you know that the Mercedes GL-Class is actually the largest SUV in the Mercedes-Benz lineup? It’s like the big daddy of all the SUVs! And get this – it can seat up to seven people comfortably. So, if you’re ever in need of a ride for a big group outing, the GL-Class has got you covered. And here’s a fun fact for you – the GL-Class is also known for its impressive towing capacity, so if you ever need to haul a trailer or boat, this bad boy can handle it with ease. Plus, with its luxurious interior and top-notch safety features, it’s no wonder why the GL-Class is a popular choice for families and adventurers alike. So, if you’re currently sitting in your GL-Class unable to get it started, just remember all the cool things this SUV can do and it’ll make the wait a little more bearable.

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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