It sounds as if you have a fuel control problem, when you take out the fuse, you are putting the system into limp mode and thus masking the problem, not making it better. You should have this checked by a tech, even if you want to do the work yourself.
The overvoltage relay does control the fuel, idle, and ABS.

------------------
Benzmac:
Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM