Hi I've done every kind of search and can't find
1. the location of the radiator fan relay(s) high and low,
2. any diagnostic thread for operating temp no cooling fan
a)higher temp high speed fan in operation
b)a/c on position cooling fan in operation

Any help would be great.

thanks

Bz

try looking up those parts,and it may point you to right direction.My w140,has a relay behind fuses,I have to remove cover

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt