I don't know what else to say. It's the big bolt that the A/C unit pivots on which is also the main bolt attaching it to the engine. I have an 86 1.6 diesel but it's probably the same on any MK2 or anything with a similar A/C pump I'm guessing. The bolt is about 10" long I believe.. I was driving across the country and it fell out at some point. Belts won't stay tight and A/C is rattling all over the place, it's terrible and simple but hard to locate. I'm located in washington state.
I also need a rear windshield wiper dash switch
car is 86 golf diesel
thanks