Why does the check engine light come on when I start my 420SEL?

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 go off shortly. Bring your vehicle in if it doesn't.

Are Mercedes-Benz 420SEL engine noises bad?

Strange engine sounds can be a sign something’s off in your Mercedes-Benz 420SEL. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.

What could damage my Mercedes-Benz 420SEL 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. Steer clear of these habits to help protect engine performance and efficiency.

Can I add water to my Mercedes-Benz 420SEL radiator?

While it’s not recommended, you can use water in your 420SEL radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.

What could cause my 420SEL engine to suddenly stop?

If your 420SEL 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 420SEL engine?

Your local Firestone Complete Auto Care offers Mercedes-Benz 420SEL engine repair. Schedule an appointment today at one of our thousands of locations nationwide!

Reliable Repairs for 1988 Mercedes-Benz 420SEL Engines

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1988 Mercedes-Benz 420SEL Trim Options

Select your Mercedes-Benz 420SEL trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V8/4.2L

Mercedes-Benz 420SEL Repairs and Services

Nothing stays the same forever. Even your Mercedes-Benz 420SEL's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 1988 Mercedes-Benz 420SEL repairs.

We’re Trained to Care for Mercedes-Benz 420SEL Engines

Mercedes-Benz 420SEL engines are known for their reliability. That might be why you bought it in the first place. However, the wear-proof engine has yet to be invented! Sometimes plans go sideways. If they do, you’ll have to find a dependable 1988 Mercedes-Benz service center — quick! 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 420SEL engines. 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 1988 Mercedes-Benz 420SEL Check Engine Light Is On

An illuminated check engine light on your Mercedes-Benz 420SEL 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 vehicle's ignition, Possible causes can include a failing oxygen sensor, damaged spark plug, issues with your catalytic converter, or a leaking engine vacuum, but that's only a few of the possible causes. Bring your 420SEL to Firestone Complete Auto Care to get computerized diagnostics and we'll determine exactly why your check engine light is on. Other signs it's time for Mercedes-Benz 420SEL engine service might include burning smells, or misfiring.

Mercedes-Benz 420SEL Engine Repair

If your 1988 420SEL 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 can wait, we'll let you know. We'll also tell you if it's necessary for your safety. We want to give you all the details you need to make an informed decision about your engine repairs. Turn to Firestone Complete Auto Care for your 1988 420SEL engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — serpentine belt, motor oil seal, fuses, or another part.

1988 Mercedes-Benz 420SEL Engine Q&A

Why does the check engine light come on when I start my 420SEL? 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 go off shortly. Bring your vehicle in if it doesn't.
Are Mercedes-Benz 420SEL engine noises bad? Strange engine sounds can be a sign something’s off in your Mercedes-Benz 420SEL. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding might be coming from the brakes, not the engine.
What could damage my Mercedes-Benz 420SEL 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. Steer clear of these habits to help protect engine performance and efficiency.
Can I add water to my Mercedes-Benz 420SEL radiator? While it’s not recommended, you can use water in your 420SEL radiator in emergencies. Normally, you should only use a 50/50 mix of coolant and water or a pre-mixed coolant. However, if you are completely out of coolant and must continue driving, it’s better to have water in your coolant reservoir than nothing.
What could cause my 420SEL engine to suddenly stop? If your 420SEL 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 420SEL engine? Your local Firestone Complete Auto Care offers Mercedes-Benz 420SEL engine repair. Schedule an appointment today at one of our thousands of locations nationwide!