You could have one or more problems. You could have a fault with the waste gate, Or you might just need some adjustment or a timing chain and sprocket. Have it checked by a knowledgeable tech.

------------------
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