Cheers, i'll look for that wire - head i assume is the engine head right, think i recall some earths there. Just to check - what does the G mean? I saw on the wiring sticky references such as M, G2 - what does that mean/in reference to.... school boy learning here :-D
Ahh found the ones you mentioned. Brown/white wire under inlet/left side. Cleaned it and also cleaned the earths near the distributor. I also have this brown and white wire disconnected under the dash actually, thought it was door related but same coliur as the one in the engine could be that - where abouts does it live?
That's your fusebox plugs, you have the ce2 fusebox: https://clubgti.com/forums/index.php?threads/fusebox-faq.219775/ Brown/white does look to be door pin related, see if you can chase to source. It probably won't be related to dash issue anyway, possibly connection for electric window module to door pin