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Window won’t close on 107 86 SL

alan a

Active Member
Joined
Jun 17, 2011
Messages
95
Location
spalding
Car
1986 300SL and 2015 c class estate
I have a 1986 300SL and the passenger window will not go up ,any help appreciated 👍
 
I’ve had a quick look and if the schematic is the right one then it’s a simple circuit that reverses the polarity on the motor for up/down.
This means that if it goes down then it should be capable of going up unless it is jammed or the switch is faulty.
So…
Does the interior light (or any other light) dim when attempting to go up?

That’s assuming the schematic is correct for the car 👍🏻👍🏻

Rdit: Is there a switch for the passenger side on the driver’s door? Schematic doesn’t show one.
 

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Open the door so that the courtesy light is on and press the up button, If the light does not dim, then it's the switch. Pull the panel up and swap the switches over to raise the window. Then use a bit of electrical tape to cover the passenger side switch until you buy another one.
 

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