Why does my R350’s check engine light come on when I start it?

It's okay if your check engine light comes on when you first start your vehicle. This is just your R350 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 R350 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.

What could damage my Mercedes-Benz R350 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.

Is it okay to put water in my Mercedes-Benz R350 radiator?

While it’s not recommended, you can use water in your R350 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 R350 engine to suddenly stop?

Reasons your R350 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.

Where can I go for Mercedes-Benz R350 repair?

Your local Firestone Complete Auto Care fixes Mercedes-Benz R350 engines. Book an appointment today! We have thousands of locations across the country.

Reliable Repairs for 2009 Mercedes-Benz R350 Engines

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2009 Mercedes-Benz R350 Trim Options

Select your Mercedes-Benz R350 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V6/3.5L

2009 Mercedes-Benz R350 Repair

Stuff wears out. Even your Mercedes-Benz R350's many parts and pieces. When something breaks or fails, we’re ready to help. Select a repair or category to learn more about 2009 Mercedes-Benz R350 services.

We Care for Mercedes-Benz R350 Engines

The Mercedes-Benz R350 is respected for its 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 the unexpected strikes, you may search the internet frantically for quick and affordable 2009 Mercedes-Benz R350 engine repairs. 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 R350 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 2009 Mercedes-Benz R350 Check Engine Light Is On

An illuminated check engine light on your Mercedes-Benz R350 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 car’s starter, Causes may include a faulty oxygen sensor, damaged spark plug, a problem with your catalytic converter, or a leak in the engine vacuum, to name a few possible causes. Bring your R350 in for an on-board diagnostic check and we'll determine exactly why your check engine light is on. rattling sounds, essential fluid leaks, or engine misfiring.

2009 R350 Engine Services

If your 2009 R350 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 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 R350 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — cambelt, engine oil seal, fuses, or another part.

2009 Mercedes-Benz R350 Engine Q&A

Why does my R350’s check engine light come on when I start it? It's okay if your check engine light comes on when you first start your vehicle. This is just your R350 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 R350 engine. Tapping or knocking could mean you're low on oil. A high-pitched whistle could signal an intake leak or misaligned belt. Squealing can be traced back to a loose fan belt, and grinding could be a sign that something is wrong with your brakes — not the engine.
What could damage my Mercedes-Benz R350 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, revving the engine while still in Park, or accelerating too quickly, too soon. Help sustain your engine’s performance and efficiency by staying miles away from these bad driving practices.
Is it okay to put water in my Mercedes-Benz R350 radiator? While it’s not recommended, you can use water in your R350 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 R350 engine to suddenly stop? Reasons your R350 car engine may suddenly stop include engine overheating, electrical troubles, mechanical issues, ignition system problems, faulty sensors, and low fuel.
Where can I go for Mercedes-Benz R350 repair? Your local Firestone Complete Auto Care fixes Mercedes-Benz R350 engines. Book an appointment today! We have thousands of locations across the country.