Pull the main fuses involved and check with an ohm meter.
Regarding the inline fuses. There is an auxillary fuse box on top of the main fuse box. Unless there is an error in my MB Electrical Troubleshooting manual, that's where you'll find them.
Good luck from California, MD (just South of Hollywood ,MD)
S, J.R. Brown
2000 G500 LWB Obsedian Black
2005 Toyota Tacoma Access Cab Off Road Sport
1993 Volvo 240 Sedan Anthracite
1980 450SEL Champange (owned it for 15 years. Great car)
1986 280GE LWB Anthracite (Sold it and kinda wish I hadn't)