emilyschwarz2
Mercedes A Klasse Brake Light Issue
Summary of the thread
A 2006 Mercedes A Klasse had non-functional brake lights and an error message on the dashboard, with a fault stored for the brake system. The issue was suspected to be a faulty brake light switch, especially since the error appeared when the brake pedal was pressed. The switch, located near the brake pedal assembly, was replaced, resolving the issue and restoring the brake lights without further error messages.
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4 comment(s)
emilyschwarz2 (community.author)
Thanks for the tip! Where is the switch located, and is it hard to replace? The error shows up when I press the brake pedal.
ottoblade1
The brake light switch is typically located near the brake pedal assembly. While some may find it straightforward, accessing it can be a bit fiddly. Given the potential impact on your brake system, and that the error appears only when the brake pedal is pressed, I recommend taking it to a workshop. They can diagnose it properly and replace the switch if necessary. I would not recommend a self repair, as a brake system is critical for safety.
emilyschwarz2 (community.author)
You were spot on! It was indeed the brake light switch. I managed to replace it myself; it was a bit awkward getting to it near the brake pedal, but all sorted now. No more error messages and the tail light is working again. Cost me nothing, as I had a spare switch lying around! Thanks a bunch for the help!
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MERCEDES
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AKLASSE
ottoblade1
Sounds like a faulty brake light switch. I had a similar issue with my A Klasse. The tail light wouldn't light up and the system threw an error. Does the error appear immediately, or only when you press the brake pedal?