forum.audiv8.com Foren English Audi V8 Forum Hey everyone, any help on these symptoms?

Hey guys, new user here, got my audi v8 about a week ago!

However now im starting to get some problems, nothing too serious tho, i guess..

First, sometimes the front differential makes noise, or atleast it feels like its the front..

Same kinda noise i used to hear from my previous RWD cars rear differential before it had its oil changed, however i can feel this one on the wheel when it happens and its LOUD, but i cant reproduce this noise on purpose no matter what i do, it just happens sometimes... id assume it just needs an oil change and aint nothing too serious? Any tips on this?

Second problem is kinda doing my head in, all my windows fog so badly i cant see anywhere as soon as the AC stops working, doesnt make air cold anymore i mean, even its turned on.. guess that needs some service too? I guess it needs "refilling" and doesnt dry the air anymore thus fogging all the windows..?

Any help is appriciated!

Oh, and its '89 3.6 quattro in case it makes any difference!