I have a couple of spare P21W sockets, can send you one
Two different types of plastic - finding a suitable glue / epoxy would be problematic, so you'd probably have to weld it in, short of replacing the entire holder.
That brown wire. I presume it is the Earth. I'd be checking the connection at the other end of it.
Classic W204 issue - earth wire is not thick enough so overheats. Some people have replaced the original wire with a better one.
Researching it it seems to be just a case of replacing the wire with thicker guage using the original endpoints. It seems to be done proactively - you might want to get a new cluster and do this before fitting it.
I had this with my C204 Estate, and found likewise - it is a common issue. Fortunately my burnt lampholder was salvageable so I ran two thicker wires and reused it.
Where did you run them to??
One was a more substantial earth - easy, to a chassis earthing point in the same location.
The other ... my memory fails me.
A gentleman in the next village has now bought the car, so I can't readily examine it.
Plug when removed
All the warning lights came on while driving to the garage so had them do it
View attachment 41855
Not enough is the answer to that!!!
Around 6 amps with everything on.Be interested to know what the cumulative amps are if one had rear fogs, reversing light, side lights and brakes on ... and what ampage that earth wire was?
My dear Mum bless her, had a C Class, and she probably would never have noticed something like that.
As she gave up driving when she was 92.
Imo that should have been a safety issue recall.