Mercedes-Benz E-Class and E-Class AMG: Warning Lights

Get ahead of a possible automotive problem by decoding the warning lights on your Mercedes-Benz E-Class' dashboard.

By Charlie Gaston - May 4, 2015

This article applies to the Mercedes-Benz E-Class and E-Class AMG (2002-2009).

The Mercedes-Benz E-Class and E-Class AMG are executive cars championed by owners and automotive experts alike due to the vehicles' impressive size and unmatched durability. Engineered to last, the E-Class is a great choice for drivers who favor dependability and function over expensive bells and whistles; although it's important to note, the E-class does not sacrifice comfort and style for performance. In fact, the E-Class offers some of the best interior and exterior trim packages on the market. To keep your vehicle driving smoothly for years to come, follow your maintenance schedule and adhere to all warning lights that appear on the dashboard. This article goes over what the most vital warning lights mean for you and your Mercedes-Benz E-Class.

Warning Lights


The brake symbol indicates one of two occurrences: either your emergency brake is engaged or there is a problem with your braking system. Unless you are a trained mechanic, it's recommended to have an experienced Mercedes-Benz brake specialist (or the service department at your local Mercedes-Benz dealership) inspect your entire braking system. The problem could be minor (i.e., low brake fluid or worn pads and drums), but it could also be major if your vehicle is in need of an entire brake job (i.e., new rotors, calipers, drums, pads and cylinders).

Figure 1. The brake symbol offers key information about your braking system.

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If your engine's temperature is higher than it should be, or your vehicle's coolant level is low (possibly due to a leak), the coolant warning light will appear on your dash. If the coolant warning light is red, the issue is your engine's temperature (i.e., it is too high). If the coolant warning light is blue, on the other hand, you will need to top off your reservoir. We recommend using Xerex Anti-freeze/Engine Coolant (G-05 Formula). If your reservoir has a leak in it, you will need to repair or replace the reservoir before adding new coolant.

Figure 2. The coolant warning light offers two possibilities.

(Related Article: Mercedes-Benz E-Class: How to Stop Coolant Leak -

Engine Oil

You should be servicing your vehicle regularly. However, if you are behind schedule and the engine oil warning light appears on your dashboard, pull over to the side of the road when it is safe to do so and check your oil. Drive to the nearest auto body shop and purchase new oil. Top off the reservoir immediately.


Never drive extended periods of time with low engine oil. And always visit your local dealer as soon as the yellow warning light that says "OIL LEVEL" appears on your dashboard.

Figure 3. Change your engine oil regularly.

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Have vehicle oils topped off or changed regularly and change your battery every 3 to 5 years. If the battery warning light appears, you will need to purchase a new one, as the one you currently have has a low charge or is bad.

Figure 4. Your battery is very important and should be replaced as needed.

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Common Questions

Should I pull over to the side of the road if I am driving while a warning light appears?

Use your best judgment. If you are near a Mercedes-Benz dealership, you might want to stop in (keep in mind it always best to set up an appointment when possible). Ask if a mechanic at the dealership can pop the hood of your vehicle and check for any major or minor problems.

Can I diagnose my own Mercedes-Benz vehicle?

Unless you are a licensed mechanic, it's recommended to leave most diagnostic work to the pros! If you have some experience working under the hood of a car and own an OBD Reader Diagnosis tool, however, we do recommend retrieving the diagnostic trouble codes stored in your vehicle. This vital information will help you to decide how to proceed next (i.e., visit a local mechanic for repair work or top off a low level fluid at home).

How do I find the best service?

If you're concerned about quality of service, stick to a consumer-validated and trusted source: your local Mercedes-Benz dealer. Dealers adhere to a uniform pricing structure that you can trust, and all work is guaranteed to ensure the best results for your hard-earned dollar.

Common Issues

Wavy Lines on the Instrument Panel

If wavy lines appear under the oil can on your instrument panel (engine oil warning light), you will need to top off your engine oil immediately.

Warning Lights No Longer Work

Don't panic. The likely culprit is a blown dashboard light fuse or light bulb. As well, make sure you haven't accidentally turned your dashboard lights off or dimmed them too low. Use the dashboard light control switch near the steering column to check.

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