Why does my 350SDL’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 light should turn off in a bit, but come see us if it doesn't.

Why does my Mercedes-Benz engine sound different?

Strange engine sounds can be a sign something’s off in your Mercedes-Benz 350SDL. Knocking or tapping could be a symptom of low oil. 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 coming from the brakes, not the engine.

What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz 350SDL 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 350SDL 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 350SDL when you’re out of coolant, having water in the coolant reservoir is better than nothing.

What can cause the engine in my 350SDL to suddenly stop?

If your 350SDL car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.

Who can repair my Mercedes-Benz 350SDL engine?

Your local Firestone Complete Auto Care has you covered with expert 350SDL engine repair. Schedule an appointment today and see us at one of our thousands of locations.

1991 Mercedes-Benz 350SDL Engine Repair

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1991 Mercedes-Benz 350SDL Trim Options

Select your Mercedes-Benz 350SDL trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

L6/3.4L

Repairs for Your 1991 Mercedes-Benz 350SDL

Nothing lasts forever. Even your Mercedes-Benz 350SDL’s engine parts and components will change. We’re here to help when something stops working. Select a repair or category to learn more about 1991 Mercedes-Benz 350SDL services.

We Care for Mercedes-Benz 350SDL Engines

Mercedes-Benz 350SDL engines are known for their reliability. You may have even been thinking about that when you bought it. However, the wear-proof engine has yet to be invented! Things can go wrong on the road. When they do, you might find yourself searching for 1991 Mercedes-Benz 350SDL engine repair or replacement parts. That’s where Firestone Complete Auto Care comes in. Since 1926, we’ve taken care of 500 million+ cars, so you can rest assured knowing your Mercedes-Benz 350SDL 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 1991 Mercedes-Benz 350SDL Check Engine Light Is On

An illuminated check engine light on your Mercedes-Benz 350SDL is one of the first signs it's time to 'brake' for engine service. A check engine light that’s on or flashing could be a symptom of a serious problem in your fuel injection, Possible causes can include a failing oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leaking engine vacuum, to name a few possible causes. Bring your 350SDL in for an on-board diagnostic check and our expert techs will get the root of the problem. engine rattling, burning smells, or misfiring.

1991 350SDL Engine Services

If your 1991 350SDL engine needs repairs, our technicians will provide you with a thorough explanation beforehand. 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. By choosing Firestone Complete Auto Care for 350SDL engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — timing belt, motor oil seal, sensors, or other parts.

Engine Q&A 1991 Mercedes-Benz 350SDL

Why does my 350SDL’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 light should turn off in a bit, but come see us if it doesn't.
Why does my Mercedes-Benz engine sound different? Strange engine sounds can be a sign something’s off in your Mercedes-Benz 350SDL. Knocking or tapping could be a symptom of low oil. 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 coming from the brakes, not the engine.
What could damage a Mercedes-Benz engine? [ordered-list-1-item-3-1]Are you unknowingly damaging your Mercedes-Benz 350SDL 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 350SDL 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 350SDL when you’re out of coolant, having water in the coolant reservoir is better than nothing.
What can cause the engine in my 350SDL to suddenly stop? If your 350SDL car engine suddenly stops, it could be due to overheating, low fuel, a faulty ignition system, sensor problems, electrical system trouble, or mechanical issues.
Who can repair my Mercedes-Benz 350SDL engine? Your local Firestone Complete Auto Care has you covered with expert 350SDL engine repair. Schedule an appointment today and see us at one of our thousands of locations.