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

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 300E testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

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

Strange engine sounds can be a sign something’s off in your Mercedes-Benz 300E. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.

What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz 300E engine?

Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.

Can I put water in my Mercedes-Benz 300E radiator?

It’s not recommended you put water in your 300E 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 can cause the engine in my 300E to suddenly stop?

There are different reasons your 300E 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 fixes Mercedes-Benz 300E engines?

Your local Firestone Complete Auto Care offers Mercedes-Benz 300E engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Engine Repairs for Your 1986 Mercedes-Benz 300E

Learn about

1986 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.

L6/3.0L

Repairs for Your 1986 Mercedes-Benz 300E

Nothing stays the same forever. Even your Mercedes-Benz 300E's many parts and pieces. We’re here to help when something stops working. Click on a repair below to learn more about 1986 Mercedes-Benz 300E repairs.

We’re Trained to Care for Mercedes-Benz 300E Engines

Mercedes-Benz 300E drivers trust that their 300E will take them near and far. You probably thought about that when you got it. However, even your trustworthy engine is subject to wear and tear. Sometimes plans go sideways. If they do, you’ll have to find a dependable 1986 Mercedes-Benz service center — quick! That's when it's time to head to Firestone Complete Auto Care. We've serviced millions of vehicles since 1926, and our professional technicians are trained to service Mercedes-Benz 300E 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.

My 1986 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 fuel, Potential causes may include a faulty oxygen sensor, bad spark plug, issues 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 300E issues diagnosed and we’ll figure out why that check engine light is giving you grief. rattling sounds, essential fluid leaks, or engine misfiring.

Mercedes-Benz 300E Engine Repair

If your 1986 300E 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 service can wait, we’ll make sure you know. But if immediate repairs are necessary for your safety, we’ll make sure that's clear, too. We want to give you all the details you need to make an informed decision about your engine repairs. Choose Firestone Complete Auto Care for Mercedes-Benz 300E engine repairs and you can feel good knowing that we only use Mercedes-Benz-compliant replacement parts such as the cambelt, valve guide seal, sensors, or other parts.

Questions About 1986 Mercedes-Benz 300E Engines

Why does the check engine light come on when I start my 300E? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your 300E testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why is my Mercedes-Benz 300E making engine noise? Strange engine sounds can be a sign something’s off in your Mercedes-Benz 300E. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing may be caused by a loose fan belt, and grinding might be a sign of brake problems rather than engine issues.
What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz 300E engine? Certain driving habits can damage your engine and should be avoided. These habits include 'running on fumes,' revving the engine while still in Park, or slamming the gas pedal while the engine is still cold. Protect your engine’s performance and efficiency by distancing yourself from these habits.
Can I put water in my Mercedes-Benz 300E radiator? It’s not recommended you put water in your 300E 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 can cause the engine in my 300E to suddenly stop? There are different reasons your 300E 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 fixes Mercedes-Benz 300E engines? Your local Firestone Complete Auto Care offers Mercedes-Benz 300E engine repair. Schedule an appointment today at one of our thousands of locations nationwide!