hi to every one the new boy on here and i have a 96 a4 b5 the diagnostic plug socket is in the rear ashtray i got a loan of a hand held code reader but the plug is to big to fit in the socket although its manuel says it should.i want to check fault codes because i usually ride a moterbike to work and after only a couple of days my cars battery is flat .i fitted new battery and alternator is charging, also when very cold it is very hard to start even with a fully charged up battery,it is like it has no choke,also on starting the revs jump from stalling point to normal going up and down for 10/ 15 seconds this also happens when you stop at a junction ect.a big read i know but has anyone got any suggestions for my problems cheers