Just dorve my new ('95) Gwagen today. The idle rises and falls, surges. I know it is probably some type of idle control valve. Where is the valve located, how difficult is it to replace and what is the approximate part cost? Thanks, Brent

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1995 G320
1984 280GE
1971 Unimog 416

The later cars don't usr a idle valve, but a throttle actuator. There is a motor hooked to the throttle butterfly. Cleaning the butterfly might help. Reading computer codes might provide more clues!

Also, I have seen the mass air meter cause this in most cases. As Doc said, read the codes and go from there. If there is more than one, I would start with the one that is fuel management related.

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS