Why does my S420’s check engine light come on when I start it?

It's okay if your check engine light comes on when you first start your vehicle. This is just your S420 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mercedes-Benz S420 making engine noise?

Strange under-the-hood noises can point to problems within your Mercedes-Benz S420 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 a sign of brake problems rather than engine issues.

What could damage my Mercedes-Benz S420 engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is 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 put water in my Mercedes-Benz S420 radiator?

It’s not recommended you put water in your S420 radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.

What could cause my S420 engine to suddenly stop?

There are different reasons your S420 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.

Who can repair my Mercedes-Benz S420 engine?

Your local Firestone Complete Auto Care offers Mercedes-Benz S420 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 1998 Mercedes-Benz S420

Learn about

1998 Mercedes-Benz S420 Trim Options

Select your Mercedes-Benz S420 trim level to learn more about Mercedes-Benz-recommended engine repair. Even Mercedes-Benz S420 parts will get older and change.

V8/4.2L

1998 Mercedes-Benz S420 Repair

Nothing stays the same forever. Even your Mercedes-Benz S420’s engine parts and components will change. 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 1998 Mercedes-Benz S420.

We Know Mercedes-Benz S420 Engines

Mercedes-Benz S420 drivers trust that their S420 will take them near and far. You may have even been thinking about that when you bought it. However, even your trustworthy engine is subject to wear and tear. Things can go sideways sometimes. If the unexpected strikes, you may search the internet frantically for quick and affordable 1998 Mercedes-Benz S420 engine repairs. That’s where Firestone Complete Auto Care comes in. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercedes-Benz S420 engines. 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.

Illuminated Check Engine Light on 1998 Mercedes-Benz S420

If your S420 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 fuel, Potential causes may include a faulty oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leaking engine vacuum, to name a few possible causes. Stop by your local Firestone Complete Auto Care to get your S420 issues diagnosed and we'll determine exactly why your check engine light is on. engine pinging noises, oil leaks, or engine misfiring.

1998 S420 Engine Services

When your Mercedes-Benz S420 engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. 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 want to provide you with the information you need to make an informed engine repair decision. Choose Firestone Complete Auto Care for Mercedes-Benz S420 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — timing belt, motor oil seal, ignition coil, or a different component.

Questions About 1998 Mercedes-Benz S420 Engines

Why does my S420’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. This is just your S420 testing its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mercedes-Benz S420 making engine noise? Strange under-the-hood noises can point to problems within your Mercedes-Benz S420 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 a sign of brake problems rather than engine issues.
What could damage my Mercedes-Benz S420 engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' flooring the gas pedal while the car is 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 put water in my Mercedes-Benz S420 radiator? It’s not recommended you put water in your S420 radiator unless it’s an emergency. Under normal circumstances, use a 50/50 mix of water and coolant or a pre-mixed coolant. But, if you need to keep driving while out of coolant, using water is better than driving with an empty coolant reservoir.
What could cause my S420 engine to suddenly stop? There are different reasons your S420 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.
Who can repair my Mercedes-Benz S420 engine? Your local Firestone Complete Auto Care offers Mercedes-Benz S420 engine repair. Schedule an appointment today at one of our thousands of locations nationwide!