You should be able to just turn the key and start this car. You may be OK because the overvoltage relay did its job! I usually do replace them because of the 5 or so diodes that are inside. We do sell parts in the partsshop and we have the manualls on CD rom. You need the 126 CD.
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM