Why does the check engine light come on when I start my GLS450?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your GLS450 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why does my Mercedes-Benz engine sound different?

Strange engine sounds can be a sign something’s off in your Mercedes-Benz GLS450. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz GLS450 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 pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my Mercedes-Benz GLS450 radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your GLS450 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

Why did my GLS450 engine suddenly stop?

Your GLS450 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who can repair my Mercedes-Benz GLS450 engine?

Your local Firestone Complete Auto Care fixes Mercedes-Benz GLS450 engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 2019 Mercedes-Benz GLS450 Engines

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2019 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

Mercedes-Benz GLS450 Repairs and Services

Nothing lasts forever. Even your Mercedes-Benz GLS450’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 2019 Mercedes-Benz GLS450 services.

We’re Trained to Care for Mercedes-Benz GLS450 Engines

The Mercedes-Benz GLS450 is respected for its reliability. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Things can go wrong on the road. When they do, you might find yourself searching for 2019 Mercedes-Benz GLS450 engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Mercedes-Benz GLS450 engine will be in good hands. If you think something’s wrong with your engine, schedule an appointment at your convenience. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

Illuminated Check Engine Light on 2019 Mercedes-Benz GLS450

An illuminated check engine light on your Mercedes-Benz GLS450 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 or emission control system that won’t go away on its own. Possible causes can include a failing oxygen sensor, bad spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few potential sources. Bring your GLS450 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. engine pinging noises, oil leaks, or misfiring.

2019 GLS450 Engine Services

If your 2019 Mercedes-Benz GLS450 needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We don't start working until we have your approval. If a repair isn’t urgent right now, we’ll let you know. We'll also tell you if it's necessary for your safety. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for GLS450 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — serpentine belt, valve guide seal, ignition coil, or other parts.

2019 Mercedes-Benz GLS450 Engine Q&A

Why does the check engine light come on when I start my GLS450? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your GLS450 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why does my Mercedes-Benz engine sound different? Strange engine sounds can be a sign something’s off in your Mercedes-Benz GLS450. Tapping or knocking could mean you need an oil change. Whistling could mean a belt is misaligned or there's an intake leak. Squealing can indicate a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz GLS450 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 pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my Mercedes-Benz GLS450 radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your GLS450 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
Why did my GLS450 engine suddenly stop? Your GLS450 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who can repair my Mercedes-Benz GLS450 engine? Your local Firestone Complete Auto Care fixes Mercedes-Benz GLS450 engines. Book an appointment today! We have thousands of locations across the country.