Why does the check engine light in my GLS450 turn on when I start my car?

It’s usually normal for your check engine light to turn on upon ignition. This is just your GLS450 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mercedes-Benz GLS450 making engine noise?

Unusual noises can signal a problem with your Mercedes-Benz GLS450 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my Mercedes-Benz GLS450 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I use water in my Mercedes-Benz GLS450 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 GLS450 to suddenly stop?

If your GLS450 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who fixes Mercedes-Benz GLS450 engines?

Your local Firestone Complete Auto Care offers Mercedes-Benz GLS450 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 2018 Mercedes-Benz GLS450

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2018 Mercedes-Benz GLS450 Trim Options

Select your Mercedes-Benz GLS450 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V6/3.0L

2018 Mercedes-Benz GLS450 Repair

Nothing stays the same forever. Even your Mercedes-Benz GLS450's many parts and pieces. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 2018 Mercedes-Benz GLS450 services.

We Know Mercedes-Benz GLS450 Engines

Mercedes-Benz GLS450 drivers trust that their GLS450 will take them near and far. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Things can go sideways sometimes. If they do, you’ll have to find a dependable 2018 Mercedes-Benz service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced more than 500 million vehicles since 1926, and our technicians know Mercedes-Benz GLS450 engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 2018 Mercedes-Benz GLS450

If your GLS450 check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your car’s starter, Possible causes can include a failing oxygen sensor, worn spark plug, a problem with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your GLS450 in for an on-board diagnostic check and we’ll figure out why that check engine light is giving you grief. engine rattling, oil leaks, or engine misfiring.

Engine Repairs for Your 2018 GLS450

When your Mercedes-Benz GLS450 engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a repair can wait, we'll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 2018 GLS450 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — cambelt, engine oil seal, ignition coil, or other parts.

Questions About 2018 Mercedes-Benz GLS450 Engines

Why does the check engine light in my GLS450 turn on when I start my car? It’s usually normal for your check engine light to turn on upon ignition. This is just your GLS450 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mercedes-Benz GLS450 making engine noise? Unusual noises can signal a problem with your Mercedes-Benz GLS450 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my Mercedes-Benz GLS450 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving your engine while the vehicle is in Park, or accelerating too quickly, too soon. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I use water in my Mercedes-Benz GLS450 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 GLS450 to suddenly stop? If your GLS450 car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who fixes Mercedes-Benz GLS450 engines? Your local Firestone Complete Auto Care offers Mercedes-Benz GLS450 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!