Why does the check engine light come on when I start my CLS400?

It's okay if your check engine light comes on when you first start your vehicle. It’s just your CLS400 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mercedes-Benz CLS400 making engine noise?

Unusual noises can signal a problem with your Mercedes-Benz CLS400 engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 my Mercedes-Benz CLS400 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle 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 CLS400 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.

Why did my CLS400 engine suddenly stop?

If your CLS400 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 repairs Mercedes-Benz CLS400 engines?

Your local Firestone Complete Auto Care fixes Mercedes-Benz CLS400 engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 2015 Mercedes-Benz CLS400

Learn about

2015 Mercedes-Benz CLS400 Trim Options

Select your Mercedes-Benz CLS400 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V6/3.0L

V6/3.5L

Mercedes-Benz CLS400 Repairs and Services

Nothing lasts forever. Even your Mercedes-Benz CLS400's many parts and pieces. We’re here to help when something stops working. Select a repair or category to learn more about 2015 Mercedes-Benz CLS400 services.

We Care for Mercedes-Benz CLS400 Engines

Mercedes-Benz CLS400 engines are known for their reliability. That might be why you bought it in the first place. However, even your trustworthy engine is subject to wear and tear. Sometimes plans go sideways. When they do, you might find yourself searching for 2015 Mercedes-Benz CLS400 engine repair or replacement parts. 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 CLS400 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 2015 Mercedes-Benz CLS400

An illuminated check engine light on your Mercedes-Benz CLS400 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 system, and it won’t go away by ignoring it. Potential causes may include a faulty oxygen sensor, bad spark plug, issues with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your CLS400 to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. engine pinging noises, essential fluid leaks, or engine misfiring.

2015 CLS400 Engine Services

If your 2015 CLS400 engine needs repairs, our expert techs will let you know what needs to be done and why before they get started. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. 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 2015 CLS400 engine repairs and you can feel good knowing that we only use Mercedes-Benz-compliant replacement parts such as the cambelt, engine oil seal, ignition coil, or a different component.

Engine Q&A 2015 Mercedes-Benz CLS400

Why does the check engine light come on when I start my CLS400? It's okay if your check engine light comes on when you first start your vehicle. It’s just your CLS400 firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mercedes-Benz CLS400 making engine noise? Unusual noises can signal a problem with your Mercedes-Benz CLS400 engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 my Mercedes-Benz CLS400 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving your engine while the vehicle 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 CLS400 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.
Why did my CLS400 engine suddenly stop? If your CLS400 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 repairs Mercedes-Benz CLS400 engines? Your local Firestone Complete Auto Care fixes Mercedes-Benz CLS400 engines. Book an appointment today! We have thousands of locations across the country.