Why does the check engine light come on when I start my SL550?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your SL550 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.

Why does my Mercedes-Benz engine sound different?

Unusual noises can signal a problem with your Mercedes-Benz SL550 engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 SL550 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 SL550 radiator?

While it’s not recommended, you can use water in your SL550 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 can cause a SL550 engine to suddenly stop?

There are different reasons your SL550 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 SL550 engines?

Your local Firestone Complete Auto Care fixes Mercedes-Benz SL550 engines. Book an appointment today! We have thousands of locations across the country.

2020 Mercedes-Benz SL550 Engine Repair

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2020 Mercedes-Benz SL550 Trim Options

Select your Mercedes-Benz SL550 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V8/4.7L

2020 Mercedes-Benz SL550 Repair

Nothing lasts forever. Even your Mercedes-Benz SL550's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 2020 Mercedes-Benz SL550 repairs.

We Know Mercedes-Benz SL550 Engines

Mercedes-Benz SL550 engines are known for their reliability. You probably thought about that when you got 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 2020 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. We've serviced more than 500 million vehicles since 1926, and our technicians know Mercedes-Benz SL550 engines. If you think something’s wrong with your engine, schedule an appointment at your convenience. After all, Firestone Complete Auto Care is one of the most popular picks for professional engine repairs thanks to its service and affordability.

My 2020 Mercedes-Benz SL550 Check Engine Light Is On

As soon as your SL550 check engine light turns on, it’s time to get an expert’s opinion. A steady or flashing check engine light could signal a serious issue with your fuel, Causes may include a faulty oxygen sensor, damaged spark plug, a problem with your catalytic converter, or an engine vacuum leak, to name a few potential sources. Bring your SL550 to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. engine rattling, burning smells, or misfiring.

2020 SL550 Engine Services

If your 2020 SL550 engine needs repairs, our technicians will provide you with a thorough explanation beforehand. We make recommendations, but you make the final decision. If a service can wait, we’ll make sure you know. If it's necessary for your safety, we'll make sure you understand that, too. We want to provide you with the information you need to make an informed engine repair decision. By choosing Firestone Complete Auto Care for SL550 engine repairs and you can feel confident knowing that we use Mercedes-Benz-approved parts and components like the cambelt, oil gasket, sensors, or other parts.

2020 Mercedes-Benz SL550 Engine Q&A

Why does the check engine light come on when I start my SL550? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your SL550 testing its circuits. The dash light shouldn't stay on. If it does, you might want to bring your vehicle in for service.
Why does my Mercedes-Benz engine sound different? Unusual noises can signal a problem with your Mercedes-Benz SL550 engine. Tapping or knocking could mean you need an oil change. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can indicate 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 SL550 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 SL550 radiator? While it’s not recommended, you can use water in your SL550 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 can cause a SL550 engine to suddenly stop? There are different reasons your SL550 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 SL550 engines? Your local Firestone Complete Auto Care fixes Mercedes-Benz SL550 engines. Book an appointment today! We have thousands of locations across the country.