Why does the check engine light come on when I start my 300E?

It’s usually normal for your check engine light to turn on upon ignition. It’s just your 300E firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.

Why is my Mercedes-Benz 300E making engine noise?

Unusual noises can signal a problem with your Mercedes-Benz 300E engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 300E engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my Mercedes-Benz 300E 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.

What can cause the engine in my 300E to suddenly stop?

Your 300E 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 300E engine?

For Mercedes-Benz 300E 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.

Reliable Repairs for 1990 Mercedes-Benz 300E Engines

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1990 Mercedes-Benz 300E Trim Options

Select your Mercedes-Benz 300E trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

L6/2.6L

L6/3.0L

1990 Mercedes-Benz 300E Repair

Nothing lasts forever. Even your Mercedes-Benz 300E's many parts and pieces. When something breaks, we're ready. Select a repair or category to learn more about 1990 Mercedes-Benz 300E services.

We Care for Mercedes-Benz 300E Engines

The Mercedes-Benz 300E is respected for its reliability. You probably thought about that when you got it. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. When they do, you might find yourself searching for 1990 Mercedes-Benz 300E engine repair or replacement parts. 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 300E engines. 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.

My 1990 Mercedes-Benz 300E Check Engine Light Is On

If your 300E 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, worn spark plug, issues with your catalytic converter, or a leaking engine vacuum, to name a few potential sources. Stop by your local Firestone Complete Auto Care to get your 300E issues diagnosed and we'll determine exactly why your check engine light is on. engine rattling, oil leaks, or misfiring.

1990 300E Engine Services

If your 1990 300E engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We never do any work without your sign-off. If a repair can wait, we'll let you know. We'll also tell you if it's necessary for your safety. 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 300E engine repairs and you can feel confident knowing that we use Mercedes-Benz-approved parts and components like the timing belt, engine oil seal, fuses, or a different component.

1990 Mercedes-Benz 300E Engine Q&A

Why does the check engine light come on when I start my 300E? It’s usually normal for your check engine light to turn on upon ignition. It’s just your 300E firing up its circuits. The light should go off shortly. Bring your vehicle in if it doesn't.
Why is my Mercedes-Benz 300E making engine noise? Unusual noises can signal a problem with your Mercedes-Benz 300E engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. 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 300E engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving your engine while the vehicle is in Park, or pushing 'the pedal to the metal' before the engine has warmed up. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my Mercedes-Benz 300E 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.
What can cause the engine in my 300E to suddenly stop? Your 300E 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 300E engine? For Mercedes-Benz 300E 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.