on the side opposite of the PCB where the copper fingers are, opposite to the copper fingers as it looks like you did a good job cleaning those. do you own an ohm meter to measure resistance for the opposite side?. On each side of the round area that makes contact can you tell me the reading in ohms. Should be very low ohms. To me it looks like the conductive surface there to close the contact has separated out. As an engineer I have designed some switches before. If that surface does not have its shorting ability you could try to adhere aluminum foil with some sort of glue to that sides buttons, ideally a ultra thin layer of silicone to give it some "play" would be the adhesive.every one of my golf 7 switches had gone bad. I opened 3 single doors one and every one had deposits on them, cleaning one as u see re pic, took off the copper track it was that bad. But the reason for this post, i have a stubborn front passenger window, re not auto up and down. So i replaced the master drivers 4 switch unit. all worked great, or so i thought. Seems totally at random on each of my journeys the window auto works "if it wants to" , i've tried resetting etc, still doenst work, then next time i get in the car, even if its after going into supermarket or the next day, the auto bit works. any ideas?
Yellow is E85. You cannot run that without a tune for it. You can put a few gallons of it in a regular tank to help with knock, but if you put a full tank of that in without a tune it will be no bueno.Yellow, fuck yes. Blue, fuck no.