SLK/R170: SLK230 tail light problem
If this is not the case, the fuse is likely to be burning out because there is something causing a short in the circuit. My suggestion is to open up the rear light and to look for a cause for the short circuit (if there is one). It may be easier to remove the whole lamp as there are only a few bolts and you can easily remove with the tools provided in your tool kit.
With the rear light the contact point is a metal plate that extends to the whole rear lamp which includes all the bulbs. Make sure that the plate is not compromised as a result of corrosion etc. Also look for any loose wires. Hope this helps.
I had a similar problem, the fuse or bulb didn't blow but the eletcical contract in the plug that holds the globe in kept failing. At of a clean up sorted it out.
Good luck.



