Why does the check engine light come on when I start my SL400?

It's okay if your check engine light comes on when you first start your vehicle. This is just your SL400 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why does my Mercedes-Benz engine sound different?

Unusual noises can signal a problem with your Mercedes-Benz SL400 engine. Knocking or tapping could be a symptom of low oil. 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 could be a sign that something is wrong with your brakes — not the engine.

What could damage my Mercedes-Benz SL400 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 accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.

Is it okay to put water in my Mercedes-Benz SL400 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 SL400 engine suddenly stop?

If your SL400 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 can repair my Mercedes-Benz SL400 engine?

Your local Firestone Complete Auto Care has you covered with expert SL400 engine repair. Schedule an appointment today and see us at one of our thousands of locations.

2015 Mercedes-Benz SL400 Engine Repair

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2015 Mercedes-Benz SL400 Trim Options

Select your Mercedes-Benz SL400 trim level to learn more about Mercedes-Benz-recommended engine repair. Even Mercedes-Benz SL400 parts will get older and change.

V6/3.0L

Repairs for Your 2015 Mercedes-Benz SL400

Nothing stays the same forever. Even your Mercedes-Benz SL400’s engine parts and components will change. We’re here to help when something stops working. Click on a repair below to learn more about 2015 Mercedes-Benz SL400 repairs.

We Care for Mercedes-Benz SL400 Engines

Mercedes-Benz SL400 drivers trust that their SL400 will take them near and far. 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. When they do, you might find yourself searching for 2015 Mercedes-Benz SL400 engine repair or replacement parts. Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Mercedes-Benz SL400 engine will be in good hands. Schedule an appointment if you're experiencing problems that could require engine repair. 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 2015 Mercedes-Benz SL400

If your SL400 check engine light is on, it’s time to get it looked at. A steady or flashing check engine light could signal a serious issue with your or emission system, and it won’t go away by ignoring it. Potential causes may include a faulty oxygen sensor, damaged spark plug, issues with your catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your SL400 issues diagnosed and our expert techs will get the root of the problem. engine rattling, oil leaks, or misfiring.

Mercedes-Benz SL400 Engine Repair

If your 2015 Mercedes-Benz SL400 needs engine repair, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a repair isn’t urgent right now, we’ll let you know. If it's necessary for your safety, we'll make sure you understand that, too. We seek to give you all the info you need to make a smart decision about our services. By choosing Firestone Complete Auto Care for SL400 engine repairs and you can feel confident knowing that we use Mercedes-Benz-approved parts and components like the timing chain or belt, valve guide seal, ignition coil, or other parts.

2015 Mercedes-Benz SL400 Engine Q&A

Why does the check engine light come on when I start my SL400? It's okay if your check engine light comes on when you first start your vehicle. This is just your SL400 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why does my Mercedes-Benz engine sound different? Unusual noises can signal a problem with your Mercedes-Benz SL400 engine. Knocking or tapping could be a symptom of low oil. 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 could be a sign that something is wrong with your brakes — not the engine.
What could damage my Mercedes-Benz SL400 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 accelerating too quickly, too soon. Steer clear of these habits to help protect engine performance and efficiency.
Is it okay to put water in my Mercedes-Benz SL400 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 SL400 engine suddenly stop? If your SL400 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 can repair my Mercedes-Benz SL400 engine? Your local Firestone Complete Auto Care has you covered with expert SL400 engine repair. Schedule an appointment today and see us at one of our thousands of locations.