Looked on the forums for help on this, but couldn't find anything. I have a 1999 E300 Turbodiesel W210. In the morning when I first start the car, the horn and sunroof work fine. After a few minutes of driving, the horn and sunroof stop working. Could this be outside temperature related, as they seem to only work in the cool morning? But as soon as it warms up, they stop working. I have checked fuse #41, and fuses under the seat, cleaned fuse contacts, etc. I have disconnected and reconnected the battery...no change. Also got a code readout from a MB tech that doesn't seem to indicate any problem with horn or sunroof, although I may not know what to look for here. Any help would be greatly appreciated.

Thanks in advance
Phil

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pjones300sd

1993 300D 199,000 plus
For Sale

1999 E300