C124 Window Regulator Power

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FlyBoyRez

Member
Joined
Apr 13, 2021
Messages
30
Location
Derby
Car
E320 CDi
Bit of an odd one…. We have a 1991 300CE-24, the near side front window is inoperative.

I’ve got the door card off as I can hear a click when the switch is pushed (up or down) but no movement. Testing the power to the two terminals delivering power I was expecting to get 12v at one when pushed for up and 12v at the other when pushed for down.

Instead I seem to have permanent 12v to both terminals. With the window leads disconnected I no longer get a click at the door, the click when switch operated now seems to have moved to a relay under the bonnet.

Before I try removing the regulator, anything else I should try?
 

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