Why does my CLS550’s check engine light come on when I start it?

It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is 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 CLS550 engine noises bad?

Strange engine sounds can be a sign something’s off in your Mercedes-Benz CLS550. 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 be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage my Mercedes-Benz CLS550 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 slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I add water to my Mercedes-Benz CLS550 radiator?

While it’s not recommended, you can use water in your CLS550 radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

What can cause a CLS550 engine to suddenly stop?

Your CLS550 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who fixes Mercedes-Benz CLS550 engines?

Your local Firestone Complete Auto Care offers Mercedes-Benz CLS550 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

2018 Mercedes-Benz CLS550 Engine Repair

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2018 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.

V8/4.7L

Repairs for Your 2018 Mercedes-Benz CLS550

Nothing stays the same forever. 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 2018 Mercedes-Benz CLS550 repairs.

We Care for Mercedes-Benz CLS550 Engines

Mercedes-Benz CLS550 engines are known for their reliability. 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 the unexpected strikes, you may search the internet frantically for quick and affordable 2018 Mercedes-Benz CLS550 engine repairs. That's when it's time to head to Firestone Complete Auto Care. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Mercedes-Benz CLS550 engine will be in good hands. If you think something’s wrong with your engine, schedule an appointment at your convenience. Firestone Complete Auto Care is a top choice for professional engine diagnosis, service, and repair at an affordable price.

Check Engine Light on 2018 Mercedes-Benz CLS550

As soon as your CLS550 check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission system that won't go away on its own. Possible causes can include a failing oxygen sensor, damaged spark plug, a problem with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Bring your CLS550 in for an on-board diagnostic check and we’ll figure out why that check engine light is giving you grief. Other signs your Mercedes-Benz CLS550 engine needs some TLC are oil leaks, or engine misfiring.

Mercedes-Benz CLS550 Engine Repair

If your 2018 Mercedes-Benz CLS550 needs engine repair, our technicians will make sure you understand what’s going on before they start working on your engine. We make recommendations, but you make the final decision. 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 seek to give you all the info you need to make a smart decision about our services. Turn to Firestone Complete Auto Care for your 2018 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, ignition coil, or a different component.

Engine Q&A 2018 Mercedes-Benz CLS550

Why does my CLS550’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. This is a sign that your vehicle is 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 CLS550 engine noises bad? Strange engine sounds can be a sign something’s off in your Mercedes-Benz CLS550. 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 be traced back to a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage my Mercedes-Benz CLS550 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 slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I add water to my Mercedes-Benz CLS550 radiator? While it’s not recommended, you can use water in your CLS550 radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What can cause a CLS550 engine to suddenly stop? Your CLS550 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who fixes Mercedes-Benz CLS550 engines? Your local Firestone Complete Auto Care offers Mercedes-Benz CLS550 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!