Why does the check engine light in my CLS550 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 CLS550 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Why does my Mercedes-Benz engine sound different?

Strange engine sounds can be a sign something’s off in your Mercedes-Benz CLS550. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have 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 CLS550 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still 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 CLS550 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 CLS550 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

Why did my CLS550 engine suddenly stop?

If your CLS550 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 CLS550 engines?

For Mercedes-Benz CLS550 engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.

Engine Repairs for Your 2009 Mercedes-Benz CLS550

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2009 Mercedes-Benz CLS550 Trim Options

Select your Mercedes-Benz CLS550 trim level to learn more about Mercedes-Benz-recommended engine repair. Even Mercedes-Benz CLS550 parts will get older and change.

V8/5.5L

2009 Mercedes-Benz CLS550 Repair

Stuff wears out. Even your Mercedes-Benz CLS550’s engine parts and components will change. When something breaks, we're ready. Click on a repair below to learn more about 2009 Mercedes-Benz CLS550 repairs.

We Care for Mercedes-Benz CLS550 Engines

The Mercedes-Benz CLS550 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. Sometimes plans go sideways. If they do, you’ll have to find a dependable 2009 Mercedes-Benz service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercedes-Benz CLS550 engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Check Engine Light on 2009 Mercedes-Benz CLS550

An illuminated check engine light on your Mercedes-Benz CLS550 is one of the first signs it's time to 'brake' for engine service. A steady or flashing check engine light could signal a serious issue with your or emission control system that won’t go away on its own. Potential causes may include a faulty oxygen sensor, worn spark plug, a clogged catalytic converter, or a leaking engine vacuum, to name a few possible causes. Bring your CLS550 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. Other signs it's time for Mercedes-Benz CLS550 engine service might include burning smells, or a sinking feeling that something’s wrong.

Mercedes-Benz CLS550 Engine Repair

When your Mercedes-Benz CLS550 engine needs repairs, 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 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 provide you with the information you need to make an informed engine repair decision. Turn to Firestone Complete Auto Care for your 2009 CLS550 engine repairs and you can feel good knowing that we only use Mercedes-Benz-compliant replacement parts such as the timing chain or belt, motor oil seal, fuses, or other parts.

2009 Mercedes-Benz CLS550 Engine Q&A

Why does the check engine light in my CLS550 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 CLS550 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Why does my Mercedes-Benz engine sound different? Strange engine sounds can be a sign something’s off in your Mercedes-Benz CLS550. Tapping or knocking could mean you're low on oil. Whistling sounds could mean you have 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 CLS550 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still 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 CLS550 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 CLS550 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
Why did my CLS550 engine suddenly stop? If your CLS550 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 CLS550 engines? For Mercedes-Benz CLS550 engine repair, trust your local Firestone Complete Auto Care. You can make an appointment today at any of our thousands of locations across the U.S.