Why does the check engine light come on when I start my 350SDL?

It’s usually normal for your check engine light to turn on upon ignition. This is just your 350SDL testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Are Mercedes-Benz 350SDL engine noises bad?

Unusual noises can signal a problem with your Mercedes-Benz 350SDL engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 350SDL 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 350SDL 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.

Why did my 350SDL engine 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 offers Mercedes-Benz 350SDL engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

1990 Mercedes-Benz 350SDL Engine Repair

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1990 Mercedes-Benz 350SDL Trim Options

Select your Mercedes-Benz 350SDL trim level to learn more about Mercedes-Benz-recommended engine repair. Even Mercedes-Benz 350SDL parts will get older and change.

L6/3.4L

Repairs for Your 1990 Mercedes-Benz 350SDL

Nothing lasts forever. Even your Mercedes-Benz 350SDL'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 1990 Mercedes-Benz 350SDL.

We Know Mercedes-Benz 350SDL Engines

Mercedes-Benz 350SDL drivers trust that their 350SDL will take them near and far. You may have even been thinking about that when you bought it. Even so, pieces and parts can break down over time. Things can go sideways sometimes. If they do, you’ll have to find a dependable 1990 Mercedes-Benz service center — quick! Luckily, you won’t have to look far, since Firestone Complete Auto Care has 1,700+ locations across the country. 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. Schedule an appointment if you're experiencing problems that could require engine repair. Firestone Complete Auto Care offers both trustworthy and affordable engine repairs.

Illuminated Check Engine Light on 1990 Mercedes-Benz 350SDL

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 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. Possible causes can include a failing oxygen sensor, bad spark plug, a problem with your catalytic converter, or a leak in the engine vacuum, to name a few potential sources. Bring your 350SDL to Firestone Complete Auto Care to get computerized diagnostics and we’ll figure out why that check engine light is giving you grief. Other signs it's time for Mercedes-Benz 350SDL engine service might include oil leaks, or a sinking feeling that something’s wrong.

Mercedes-Benz 350SDL Engine Repair

When your Mercedes-Benz 350SDL engine needs repairs, our technicians will make sure you understand what’s going on before they start working on your engine. We don't start working until we have your approval. If a repair can wait, 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. Turn to Firestone Complete Auto Care for your 1990 350SDL engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — serpentine belt, motor oil seal, sensors, or another part.

Questions About 1990 Mercedes-Benz 350SDL Engines

Why does the check engine light come on when I start my 350SDL? It’s usually normal for your check engine light to turn on upon ignition. This is just your 350SDL testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Are Mercedes-Benz 350SDL engine noises bad? Unusual noises can signal a problem with your Mercedes-Benz 350SDL engine. Knocking or tapping could be a symptom of low oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 350SDL 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 350SDL 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.
Why did my 350SDL engine 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 offers Mercedes-Benz 350SDL engine repair. Schedule an appointment today at one of our thousands of locations nationwide!