Mercedes G-klasse AMG Wont Start? Here’s Quick Solutions to Most Common Problems

Intro

As a skilled car mechanic with over 20 years of experience, I’ve helped plenty of people struggling when their Mercedes G-klasse AMG Won’t Start. And I’ll be straight with you, not being able to start your car when you need to drive is super bothersome.

But keep your chin up, you’ve come to the right place, no need to keep googling searches like “Mercedes has trouble starting“, 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 frequent causes for why your G-klasse AMG doesn’t start. I’ll detail all the typical culprits so you can diagnose what’s causing issues, plus what to do to resolve each specific problem. Drawing on my two decades of firsthand experience, I’ll supply practical repair advice to get your Mercedes G-klasse AMG up and moving as soon as possible!

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Why Won’t My a Mercedes Start?

Mercedes G-klasse AMG wont start

Before we tackle the laundry list of possible issues and solutions, it’s key to first get on the same page of the central issue. When you climb into your Mercedes G-klasse AMG and realize “it won’t start!”, there could be several parts causing the troubles. Perhaps the engine doesn’t turn over whatsoever, or possibly it’s cranking but not firing. Or you might hear clicking when you try to start it, but sadly no ignition occurs. Each scenario can indicate different problems under the hood.

Common Reasons Why Your Mercedes G-klasse AMG Won’t Start

There are many culprits as to why your G-klasse AMG won’t turn on. Typical causes include a weak or drained battery, defective alternator, starter motor issues, fuel system problems, plus electrical or wiring malfunctions. Every one of these issues can show up 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 G-klasse AMG That Won’t Start

Identifying these symptoms will lead you to the main issue. Take for example, when you turn the key or press the start button and you hear it turning over yet no start up, it often indicates a fuel or ignition issue.

Analysis of The Reasons Why Your Mercedes G-klasse AMG Won’t Start

The first step in remedying the no-start hassle is pinpointing the precise cause of the issue. So let’s examine the most frequent reasons behind the G-klasse AMG struggling to start when you turn the key.

Battery Issues in a Mercedes G-klasse AMG

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

In the vast majority of situations, the most typical reason a Mercedes G-klasse AMG won’t start comes down to battery troubles. Specifically, a weak or dead battery prevents the engine from cranking. The car’s battery supplies the necessary electrical juice to start the engine and activate all your electronics. Signs of a dying battery include sluggish or strained cranking, faint headlights, or a battery alert symbol 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 G-klasse AMG

car wont start alternator

The Alternator keeps the battery charged by harnessing engine power while driving. A worn out alternator can easily stop your Mercedes G-klasse AMG from starting since it fails to recharge the battery, draining it completely so that one day you climb into your beloved Mercedes G-klasse AMG and it just can’t start. Clues of a wonky alternator can be an illuminated battery or alternator caution light on the dash, dull headlights while idling, or a grinding noise from the engine while running.

Starter Motor Failures in a Mercedes G-klasse AMG

car wont start wont turn over

The starter motor is key to turning over the engine when you try and start up your Mercedes. In the event of starter problems, the engine can’t crank, preventing your G-klasse AMG from starting. Listen out for clicking sounds when you turn the key or grinding during cranking, which could indicate starter issues.

Fuel System Issues in a Mercedes G-klasse AMG

car wont start fuel filter

This isn’t about running out of gas like a silly goose. Instead, it’s problems in the fuel system itself that could leave your G-klasse AMG unable to start up. Your Mercedes G-klasse AMG uses gas to mix with air and powers the engine. So problems here like a clogged fuel filter or damaged fuel pump relay can result in 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 clear any blockages and improve starting.

Electrical System or Wiring Problems in a Mercedes G-klasse AMG

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 Mercedes’s, the usual suspects include blown fuses, spark issues, broken ignition switches, or non-working sensors. Faulty wiring and electronics like these can all prevent your car from starting. Be on the lookout for intermittent starting, dashboard alerts, or failure to crank as signs of an underlying electrical issue. Pinpointing and fixing these typically requires a knowledgeable mechanic near you.

Solutions: Let’s Get Your Mercedes G-klasse AMG Starting Again!

If you think you might know what the issue may be, it’s time to figure out the reason behind your car’s inability to start up, and then the logical next move is to try to fix the issue. Here are some tips for frequent problems we’ve discussed up to this point:

How to Identify and Fix Battery Issues in a Mercedes G-klasse AMG

car not starting but battery is fine

If you think a battery issue is to blame for your Mercedes’s difficulty cranking, first check the battery terminals Make sure they are clean, secure, and properly 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 G-klasse AMG 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 G-klasse AMG’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 G-klasse AMG

Car wont start replace alternator needed

If you suspect the alternator is causing your vehicle 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 the engine is running, disconnect the positive terminal of the battery. If the vehicle dies fairly quickly after that, it’s likely a bad alternator. However, be cautious this test can be dangerous and damage delicate electronics in your ride, 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 auto.

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 G-klasse AMG. You find all the information you need about your specific vehicle by searching online for something like “accident check vin 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 G-klasse AMG

starter motor issues in a ford

If you wonder if the starter motor is the root cause for your G-klasse AMG failing to ignite, listen carefully for a clicking sound when you turn the ignition key. If present, but the engine does not turn over, the starter motor likely needs replacing. You can take it to a local garage and have them repair it, or repair it yourself with the help and advice from an online mechanic guiding you. 

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

How to Identify and Solve Fuel System Problems in a Mercedes G-klasse AMG

clogged fuel filter car wont start

If you suspect a fuel system issue might be to blame for the no-start, tune your ears for the fuel pump noise when you turn the key to “on” before trying to turn over the car. The pump should emit a quiet humming for a few seconds. If such a noise is not heard, the fuel pump could be defective. Difficult starting, stalling, or poor throttle response may also stem from a blocked fuel filter. Both pump and filter issues normally require a professional mechanic to inspect and repair 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 G-klasse AMG

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 G-klasse AMG starts after this, it was an effective, cheap repair! But if your Mercedes G-klasse AMG refuses to start, even sometimes, the ignition switch itself could be problematic. Dash lights on the dashboard could additionally mean a damaged sensor. These can be intricate issues needing a qualified mechanic to diagnose and fix (see below advice on local mechanics).

How to Prevent Starting Issues in a Mercedes G-klasse AMG

As my dad would say: “An ounce of prevention is worth a pound of cure”. Here’s how to prevent future problems starting your G-klasse AMG:

Regular Maintenance of Your Mercedes G-klasse AMG

Regular maintenance on car to prevent starting issues

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

Drive Your G-klasse AMG Frequently

drive regular to avoid car troubles

If your Mercedes G-klasse AMG happens to sit motionless in the garage or front yard for too long 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 Mercedes G-klasse AMG regularly to maintain 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 entirely 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 irregular 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 you have limited time available, 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.

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 G-klasse AMG that’s having issues or a Mercedes G-Class won’t start, the online mechanics can help sort anything in no time. And with many household budgets tighter these days, the convenience and affordability of online mechanics help, keep your wallet happy too.

You can describe the issues you’re having, ask Mercedes mechanics unlimited questions, and even submit images and videos so you can demonstrate to the expert what you mean. You can talk to them via online chat or phone call, whatever you like. The Mercedes specialist will ID the issue, recommend the top solution for your particular case, and even guide you on 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 to see firsthand how convenient fixing problems can be.

So feel free to try out our Mercedes repair advice service and see for yourself!

When and How to Get a Local Mercedes Mechanics Help

automobile mobile mechanic

When your Mercedes G-klasse AMG 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 G-klasse AMG started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “mobile auto repair 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:

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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
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Conclusion

In short, when your Mercedes G-klasse AMG doesn’t turn over, it can be a major inconvenience. However, grasping what might be causing 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. Keep in mind that regular maintenance is vital to preventing most vehicle problems.

Frequently Asked Questions (FAQs) When a Mercedes G-klasse AMG Won’t Start

Mercedes G-klasse AMG won’t start but lights come on?

If your Mercedes G-klasse AMG‘s lights illuminate 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. Check to see if you hear any clicking sounds 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 G-klasse AMG won’t start but has power?

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

Mercedes G-klasse AMG won’t start but battery is fine?

If your Mercedes G-klasse AMG‘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 G-klasse AMG 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 mechanical repair or replacing, consult with a reliable mechanic to get your Mercedes G-klasse AMG running again.

What if my Mercedes G-klasse AMG 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. Chances are 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 ask for help from a trusted Mercedes mechanic locally or online.

How do I know if my Mercedes G-klasse AMG 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 make sure the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is worn out it’s probably best to just replace it completely.

How to prevent my Mercedes G-klasse AMG from failing to start in the future?

To prevent this hassle from happening again, scheduled maintenance is essential. This includes oil changes, testing the battery and cleaning its terminals, changing out the fuel filter when necessary, and getting your Mercedes G-klasse AMG evaluated by a mechanic on a regular basis. Additionally, be diligent about drive the car regularly so the battery stays charged.

Can I consult an online mechanic if my Mercedes G-klasse AMG fails to start up?

Yes, you can. An online mechanic service like ours can offer instant expert Mercedes mechanic assistance and advice, without you having to leave your residence. This is especially useful if your Mercedes G-klasse AMG is unable to start and is stuck in the parking area,.

How can services like MechanicAnswer.com lend a hand if my Mercedes G-klasse AMG isn’t starting?

We connect you with licensed Mercedes mechanics who can supply suggestions specific to your individual situation. You can inform them about your vehicle troubles, ask unlimited questions as needed, upload videos or pictures so you can show in detail the issue. The mechanic will be capable to help, identify the issue, and propose the best remedy and talk you through it.

Interesting Mercedes G-klasse AMG Facts

Did you know that the Mercedes G-klasse AMG has a top speed of 149 mph and can go from 0 to 60 mph in just 5.6 seconds? That’s faster than most sports cars! And get this – the G-klasse AMG has a towing capacity of up to 7,000 pounds, so you can haul just about anything with this beast of a vehicle. Plus, it’s equipped with a 4.0-liter V8 engine that produces a whopping 577 horsepower. That’s enough power to conquer any terrain, whether you’re off-roading or cruising down the highway. And the interior is just as impressive, with luxurious leather seats and a state-of-the-art infotainment system. No wonder you’re itching to get behind the wheel – who wouldn’t want to experience the thrill of driving such an incredible machine?

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  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
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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