The W210 has four (!) fuse locations (and the general description of what is there)
- In the passenger side electronics bay, on the K40 relay (engine controls)
- In the fuse box on the drivers side (most of the rest of the loads in the front half of the car)
- The light switch assembly, remove the plastic sail panel on the side of the dash (all exterior lights)
- Under the back seat (loads in the back half of the car)

My 210 main under hood fuse box is about 1/3 full. There are many more positions than circuits used.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech