Why does my S450’s check engine light come on when I start it?

It’s usually normal for your check engine light to turn on upon ignition. 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.

Why does my Mercedes-Benz engine sound different?

Unusual noises can signal a problem with your Mercedes-Benz S450 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 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 S450 engine?

Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Can I add water to my Mercedes-Benz S450 radiator?

An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your S450 when you’re out of coolant, having water in the coolant reservoir is better than nothing.

Why did my S450 engine suddenly stop?

There are different reasons your S450 vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.

Where can I go for Mercedes-Benz S450 repair?

For Mercedes-Benz S450 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 2020 Mercedes-Benz S450

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2020 Mercedes-Benz S450 Trim Options

Select your Mercedes-Benz S450 trim level to learn more about Mercedes-Benz-recommended engine repair. Even Mercedes-Benz S450 parts will get older and change.

Repairs for Your 2020 Mercedes-Benz S450

Nothing lasts forever. Even your Mercedes-Benz S450'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 S450.

We Care for Mercedes-Benz S450 Engines

The Mercedes-Benz S450 is respected for its reliability. You probably thought about that when you got it. Even so, pieces and parts can break down over time. Things can go wrong on the road. When they do, you might find yourself searching for 2020 Mercedes-Benz S450 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 S450 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 offers both trustworthy and affordable engine repairs.

My 2020 Mercedes-Benz S450 Check Engine Light Is On

If your S450 check engine light is on, it’s time to get it looked at. A check engine light that’s on or flashing could be a symptom of a serious problem in your fuel, Possible causes can include a failing oxygen sensor, damaged spark plug, a clogged catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Bring your S450 to Firestone Complete Auto Care to get computerized diagnostics and we'll determine exactly why your check engine light is on. Other signs your Mercedes-Benz S450 engine needs some TLC are burning smells, or misfiring.

2020 S450 Engine Services

If your 2020 Mercedes-Benz S450 needs engine repair, our technicians will make sure you understand what’s going on before they start working on your engine. We never do any work without your sign-off. 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 want to provide you with the information you need to make an informed engine repair decision. Choose Firestone Complete Auto Care for Mercedes-Benz S450 engine repairs and you can feel confident knowing that we use Mercedes-Benz-approved parts and components like the timing belt, valve guide seal, fuses, or a different component.

Engine Q&A 2020 Mercedes-Benz S450

Why does my S450’s check engine light come on when I start it? It’s usually normal for your check engine light to turn on upon ignition. 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.
Why does my Mercedes-Benz engine sound different? Unusual noises can signal a problem with your Mercedes-Benz S450 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 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 S450 engine? Certain driving habits can hurt your engine. These habits include driving on an empty fuel tank, revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Can I add water to my Mercedes-Benz S450 radiator? An emergency is the only time you should consider putting water in your radiator. Outside of that, it’s recommended you use a pre-mixed coolant or a 50/50 blend of water and coolant. However, if you need to continue driving your S450 when you’re out of coolant, having water in the coolant reservoir is better than nothing.
Why did my S450 engine suddenly stop? There are different reasons your S450 vehicle engine could suddenly stop. You may be looking at a lack of fuel, faulty sensors, issues with the ignition system, engine overheating, electrical problems, or mechanical troubles.
Where can I go for Mercedes-Benz S450 repair? For Mercedes-Benz S450 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.