I have a r129 sl500 that I replaced the evaporator on. My question is what sensor operates the auxilary fan on slow speed>????? Mine seem to only go either hi or nothing,,,,,, I thought that this has a intermediate speed of like 500 rpms or even less....thanks for the info.

a2

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a2


1978 280 CE silver
1986 560 SL black
1987 300 SDL cream
1994 SL 500 brilliant green
1997 E 300d dessert silver
2005 FORD F250 Superduty Crew cab 4x4

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