Thanks for all the help guys...
Right.. after reading around and getting anooied I just said F it and just brought these POWERFLEX REAR TRAILING ARM BUSH BMW E36 3 SERIES + M3 | eBay as lots of people say you dont need special tools to fit!
They were on the car when I got it but had a look this evening and abit of a play.. the bulbs look ok.. not sure how to test the rings but Im guessing it might be the inverters, so Ive just brought 2 of these aswell! lol.
Is it probably them?