1994 Mercedes-Benz E420 Question: A/C BLOWER SOMETIMES WORKS; NOT NOW, WHERE IS THE FUSE?

The main fuse box is in the rear of the engine compartment on the driver's side near to the brake master cylinder. Fuse identification should be on the lid of the fuse box. Not sure if these links will help check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/
These helps will help:
Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is also a company that independent auto repair shops buy their information from that the same information inexpensively to do it yourselfers. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

the blower fuse is NOT located inside the main fuse box. it
is a "strip" fuse in a little black box (about 1.5x.5 inches) located forward of the main fuse box. it is very common for these fuses to get stress cracks which you cannot see, but still causes the blower to come on and off
at random. you can get this fuse at a MB repair shop; parts
stores do not have them. might as well get a spare.