Headlights stay on?

LATOYAPRESTON

MEMBER
2009 MERCEDES BENZ E350
59,880 MILES

First my headlight blink on and off then it stay on wouldnt turn off. A few days later all my service light blinks, my headlight blinks, anyl light that can blonk will blink all at once if the car is on. My radio comes on amd off. My sunroof opens slowly. Please help I have no idea whats wrong. I also get a new kep message as well.

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Clearly this could be a number of issues. However, the most common thing to cause all sorts of electrical issues out of the blue like this is a weak battery.

We need to load test the battery and then replace if it is weak. Here is a guide that will help with this:

https://www.2carpros.com/articles/car-battery-load-test

If the battery is not the issue then we could have an issue with body controller but this is expensive and not likely to cause these different types of issues. The slowly moving sunroof is what gives us the idea that the battery is at fault.

Here is a guide that helps with how to replace the battery:

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Let us know what you find. Thanks