Why does the check engine light in my CLS450 turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your CLS450 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 under-the-hood noises can point to problems within your Mercedes-Benz CLS450 engine. 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 coming from the brakes, not the engine.

What could damage my Mercedes-Benz CLS450 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Can I use water in my Mercedes-Benz CLS450 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 a CLS450 engine to suddenly stop?

Reasons your CLS450 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Who can repair my Mercedes-Benz CLS450 engine?

For Mercedes-Benz CLS450 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.

Reliable Repairs for 2020 Mercedes-Benz CLS450 Engines

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2020 Mercedes-Benz CLS450 Trim Options

Select your Mercedes-Benz CLS450 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

2020 Mercedes-Benz CLS450 Repair

Nothing stays the same forever. Even your Mercedes-Benz CLS450's many parts and pieces. We’re here to help when something stops working. Select a service or repair below to learn more about what we can do for your 2020 Mercedes-Benz CLS450.

We’re Trained to Care for Mercedes-Benz CLS450 Engines

The Mercedes-Benz CLS450 is respected for its reliability. 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 they do, you’ll have to find a dependable 2020 Mercedes-Benz service center — quick! 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 CLS450 engines. Schedule a courtesy inspection at the first sign of engine trouble. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

My 2020 Mercedes-Benz CLS450 Check Engine Light Is On

As soon as your CLS450 check engine light turns on, it’s time to get an expert’s opinion. A check engine light that’s on or flashing could be a symptom of a serious problem in your fuel injection, Possible causes can include a failing oxygen sensor, worn 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 CLS450 to Firestone Complete Auto Care to get computerized diagnostics and we’ll figure out why that check engine light is giving you grief. rattling sounds, burning smells, or a sinking feeling that something’s wrong.

Engine Repairs for Your 2020 CLS450

When your Mercedes-Benz CLS450 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 service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for CLS450 engine repairs and you can feel good knowing that we only use Mercedes-Benz-compliant replacement parts such as the cambelt, engine oil seal, sensors, or a different component.

Questions About 2020 Mercedes-Benz CLS450 Engines

Why does the check engine light in my CLS450 turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your CLS450 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 under-the-hood noises can point to problems within your Mercedes-Benz CLS450 engine. 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 coming from the brakes, not the engine.
What could damage my Mercedes-Benz CLS450 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, flooring the gas pedal while the car is in Park, or accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Can I use water in my Mercedes-Benz CLS450 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 a CLS450 engine to suddenly stop? Reasons your CLS450 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Who can repair my Mercedes-Benz CLS450 engine? For Mercedes-Benz CLS450 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.