Why does the check engine light in my E320 turn on when I start my car?

Generally, your check engine light turning on upon ignition is not a bad thing. This is just your E320 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.

Are Mercedes-Benz E320 engine noises bad?

Unusual noises can signal a problem with your Mercedes-Benz E320 engine. 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 could be a sign that something is wrong with your brakes — not the engine.

What could damage my Mercedes-Benz E320 engine?

Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is 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.

Is it okay to put water in my Mercedes-Benz E320 radiator?

While it’s not recommended, you can use water in your E320 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 E320 engine to suddenly stop?

Your E320 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.

Who repairs Mercedes-Benz E320 engines?

Your local Firestone Complete Auto Care fixes Mercedes-Benz E320 engines. Book an appointment today! We have thousands of locations across the country.

Engine Repairs for Your 2004 Mercedes-Benz E320

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2004 Mercedes-Benz E320 Trim Options

Select your Mercedes-Benz E320 trim level to learn more about Mercedes-Benz-recommended engine repair. Use the following chart to find information.

V6/3.2L

2004 Mercedes-Benz E320 Repair

Nothing lasts forever. Even your Mercedes-Benz E320’s engine parts and components will change. 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 2004 Mercedes-Benz E320.

We Know Mercedes-Benz E320 Engines

Mercedes-Benz E320 drivers trust that their E320 will take them near and far. That might be why you bought it in the first place. Even so, pieces and parts can break down over time. Sometimes plans go sideways. If they do, you’ll have to find a dependable 2004 Mercedes-Benz service center — quick! That’s where Firestone Complete Auto Care comes in. We've serviced more than 500 million vehicles since 1926, and our technicians know Mercedes-Benz E320 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 2004 Mercedes-Benz E320 Check Engine Light Is On

As soon as your E320 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 car’s starter, 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 possible causes. Bring your E320 to Firestone Complete Auto Care to get computerized diagnostics and our expert techs will get the root of the problem. Other signs your Mercedes-Benz E320 engine needs some TLC are essential fluid leaks, or engine misfiring.

Mercedes-Benz E320 Engine Repair

If your 2004 Mercedes-Benz E320 needs engine repair, our expert techs will let you know what needs to be done and why before they get started. We never do any work without your sign-off. If a repair isn’t urgent right now, 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. By choosing Firestone Complete Auto Care for E320 engine repairs and you can drive easy knowing that we use Mercedes-Benz-approved parts and fluids — cambelt, motor oil seal, sensors, or another part.

2004 Mercedes-Benz E320 Engine Q&A

Why does the check engine light in my E320 turn on when I start my car? Generally, your check engine light turning on upon ignition is not a bad thing. This is just your E320 testing its circuits. The light should turn off in a bit, but come see us if it doesn't.
Are Mercedes-Benz E320 engine noises bad? Unusual noises can signal a problem with your Mercedes-Benz E320 engine. 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 could be a sign that something is wrong with your brakes — not the engine.
What could damage my Mercedes-Benz E320 engine? Some driving habits are not so great for your engine. These include driving on a near-empty gas tank, flooring the gas pedal while the car is 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.
Is it okay to put water in my Mercedes-Benz E320 radiator? While it’s not recommended, you can use water in your E320 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 E320 engine to suddenly stop? Your E320 car engine could stop suddenly due to low fuel, electrical issues, overheating, a faulty ignition system, mechanical troubles, or sensor problems.
Who repairs Mercedes-Benz E320 engines? Your local Firestone Complete Auto Care fixes Mercedes-Benz E320 engines. Book an appointment today! We have thousands of locations across the country.