what does the AC Fan resistors do? I want to know if I can change values so fans will com on at 92c. Tried to put photo of it up.Attached Images

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

On the 1999 S320? Fan control is by fan control unit & is variable.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Thanks MB,any thing I can do to avoid a headgasket I wil try to keep the M104 cooler.
I no they leak oil not compression but perhaps cooler oil will help.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Heat isn't the problem, the length of the engine is.
99.9% of M104 headgasket issues are oil leaks after 1993.
Movement of the aluminum head on the cast iron block & high oil pressure causes those leaks.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator