CLS W219 £rd Brake Light Warning

mikerd4

Member
Joined
Oct 17, 2015
Messages
50
Car
CLS
Had a third brake light warning pop up on the dash today.
Before I go ordering a replacement brake light does anyone know if there is a common failure point on these? ie chaffed wires, seperate fuse, dodgy relay etc or even a easy way to test it?

A quick look around makes replacing the 3rd lamp look like a right pain including removing the rear seats....
 

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