Why does my GL550’s check engine light come on when I start it?

It’s usually normal for your check engine light to turn on upon ignition. This is just your GL550 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are Mercedes-Benz GL550 engine noises bad?

Strange under-the-hood noises can point to problems within your Mercedes-Benz GL550 engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my Mercedes-Benz GL550 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my Mercedes-Benz GL550 radiator?

Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.

What can cause the engine in my GL550 to suddenly stop?

If your GL550 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Where can I go for Mercedes-Benz GL550 repair?

Your local Firestone Complete Auto Care fixes Mercedes-Benz GL550 engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 2012 Mercedes-Benz GL550 Engines

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2012 Mercedes-Benz GL550 Trim Options

Select your Mercedes-Benz GL550 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V8/5.5L

2012 Mercedes-Benz GL550 Repair

Nothing lasts forever. Even your Mercedes-Benz GL550's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 2012 Mercedes-Benz GL550 repairs.

We Know Mercedes-Benz GL550 Engines

Mercedes-Benz GL550 drivers trust that their GL550 will take them near and far. You probably thought about that when you got it. However, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If the unexpected strikes, you may search the internet frantically for quick and affordable 2012 Mercedes-Benz GL550 engine repairs. That's when it's time to head to Firestone Complete Auto Care. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercedes-Benz GL550 engines. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Illuminated Check Engine Light on 2012 Mercedes-Benz GL550

An illuminated check engine light on your Mercedes-Benz GL550 is one of the first signs it's time to 'brake' for engine service. A check engine light that’s on or flashing could be a symptom of a serious problem in your fuel, Causes may include a faulty oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leak in the engine vacuum, but that's only a few of the possible causes. Bring your GL550 to Firestone Complete Auto Care to get computerized diagnostics and we’ll figure out why that check engine light is giving you grief. engine rattling, burning smells, or engine misfiring.

2012 GL550 Engine Services

If your 2012 GL550 engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We never do any work without your sign-off. If a service can wait, we’ll make sure you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We seek to give you all the info you need to make a smart decision about our services. By choosing Firestone Complete Auto Care for GL550 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — serpentine belt, engine oil seal, fuses, or a different component.

2012 Mercedes-Benz GL550 Engine Q&A

Why does my GL550’s check engine light come on when I start it? It’s usually normal for your check engine light to turn on upon ignition. This is just your GL550 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are Mercedes-Benz GL550 engine noises bad? Strange under-the-hood noises can point to problems within your Mercedes-Benz GL550 engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my Mercedes-Benz GL550 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my Mercedes-Benz GL550 radiator? Only in emergencies. A 50/50 mix of coolant and water (or a pre-mixed) coolant is recommended. However, if you must keep driving when you're out of coolant, it's better to drive with water in your coolant reservoir than nothing.
What can cause the engine in my GL550 to suddenly stop? If your GL550 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Where can I go for Mercedes-Benz GL550 repair? Your local Firestone Complete Auto Care fixes Mercedes-Benz GL550 engines. Book an appointment today! We have thousands of locations across the country.