IIRC the 2 grey wires are on the tail of the wiper switch on a separate small plug at the top, which is the delay circuit. I referred to it on an earlier post re the plastic locator being brittle. I found on mine the routing of those wires was quite tight, so subject to chafe.
Yours must be a bit different as I did not have to remove the wheel.
Good luck finding the break. My break in the washer feed was a s** to see.


4/4 Ivory 4.1:1 axle, Mercedes A200 AMG