Hope someone can help me diagnose this problem. The fuse on position C on my 1990 300E blows everytime I put a new one in. (3 gone so far).

This fuse controls the power locks and rear trunk lock and a few other things that I don't really notice or miss. I also noticed the dome light is not acting properly either. I have to keep it turned off. I think it has something to do with the anti-theft, which is also tied to Fuse 'C'.

Anybody can help me diagnose? If I only had a circuit diagram, I can probably figure out where it is shorting, but I don't. If anyone can email, that would be great.

thanks.