The fuel pump relay is at fault most likely!! We sell them in the partsshop!
It is a known fault that has caused many complaints such as this one. If you want you can use the search function to see for yourself in the archives.

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