Got in the car this morning to find air susp inactive light on as I need a compressor but then the hdc inactive light on, abs light, a orange (!) light, low range gear box light flashing, then when driving it kept flashing select neutral and tans box neutral someone please tell me it's just a compressor confusing everythig???

sounds likely ...most of the ecu's do 'talk' to each other so maybe thats why you are getting the errors..

have you tried dis-connecting the battery to see if the ecu's settle down...

Can I just disconnect battery then reconnect and drive off no reprogramming or imobilzer problems or anything?

wait 10 minutes before disconnecting the battery [key out of ignition]
wait 20 minutes before re-connecting
when battery re-connected , turn steering wheel fully to the left and the fully to the right.

One more small point; what state is the battery in?

If it's a bit leggy then that could also cause plenty of problems.

Got told it had a new battery just befor a got it. The battery looks new but after a week the battery went dead after having the radio on for half an hour

your problems could relate to a dodgy or underpowered battery...you should have a 110amphr ,920 crank, battery on the td6..

It's goin back next week al get them to check it out thanks very much for the help and advice

A lot of short trips may not charge the battery sufficiently, considering that the compressor just ran..etc....if you keep the headlights set to auto turn on, and they illuminate as you start the vehicle, that could cause the available vols/amps to be lower than the required minimum amount needed, to initially get the systems booted up properly. And if you left the climate control on........the battery will be powering the fan to. Lets not forget that the steering wheel tilt is probably adjusting at the same time too. So........make sure everything is off before attempting to start, turn key to position one until the steering wheel is done adjusting, then finally start her up. If you want to be really cautious..........wait for the logo splash screen to turn off. By that time power has gone through the entire system loop. 2006 RR 4.4 HSE
2008 Audi A6