Why does the check engine light come on when I start my S400?

It’s usually normal for your check engine light to turn on upon ignition. This is just your S400 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 S400 engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz S400 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my Mercedes-Benz S400 radiator?

While it’s not recommended, you can use water in your S400 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 S400 engine to suddenly stop?

Your S400 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who can repair my Mercedes-Benz S400 engine?

For Mercedes-Benz S400 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 2010 Mercedes-Benz S400

Learn about

2010 Mercedes-Benz S400 Trim Options

Select your Mercedes-Benz S400 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V6/3.5L

Mercedes-Benz S400 Repairs and Services

Nothing stays the same forever. Even your Mercedes-Benz S400's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 2010 Mercedes-Benz S400 repairs.

We Know Mercedes-Benz S400 Engines

Mercedes-Benz S400 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! Sometimes plans go sideways. When they do, you might find yourself searching for 2010 Mercedes-Benz S400 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 S400 engine will be in good hands. 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 2010 Mercedes-Benz S400

If your S400 check engine light is on, it’s time to get it looked at. A check engine light that’s flashing or steadily illuminated could point to problems with your or emission control system that won’t go away on its own. Potential causes may include a faulty oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Stop by your local Firestone Complete Auto Care to get your S400 issues diagnosed and we'll determine exactly why your check engine light is on. engine pinging noises, burning smells, or engine misfiring.

Engine Repairs for Your 2010 S400

If your 2010 S400 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. If it's necessary for your safety, we'll make sure you understand that, too. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 2010 S400 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — timing belt, motor oil seal, fuses, or a different component.

Questions About 2010 Mercedes-Benz S400 Engines

Why does the check engine light come on when I start my S400? It’s usually normal for your check engine light to turn on upon ignition. This is just your S400 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 S400 engine. Tapping or knocking could mean you're low on oil. Whistling could mean a belt is misaligned or there's an intake leak. Squealing may be caused by a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz S400 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is in Park, or slamming the gas pedal while the engine is still cold. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my Mercedes-Benz S400 radiator? While it’s not recommended, you can use water in your S400 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 S400 engine to suddenly stop? Your S400 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who can repair my Mercedes-Benz S400 engine? For Mercedes-Benz S400 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.