Coolant Temperature sensor W126 ?

02-08-2001, 11:26 AM

Artie Stringer

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Hi,

I have been chasing a warm up idle speed problem in my 1985 500SE. This has been hampered by the absence of a definitive wiring diagram. Local dealer supplied diagram of CIS-E; which does not match my setup.

The problem is low erratic idle with stumbles and stalls; which occurs after a problem free startup and when the temp gauge shows 40degs c to 60degs c. At approx 60degs c idle speed rises to a smooth idle as if a switch had been thrown.

Could someone give me the location of the coolant temp. sensor on this model and the expected electrical resistance.

Artie Stringer

1985 500SE

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