Two things. The fuel injectors have been known to fail on this model. You have to replace them if failed. The other thing I have seen is the distributor caps will corrode badly. Take them off and you will see it quickly if they are bad. They will have a green inner tint if faulty.

------------------
Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM