Having recently acquired an S6 Avant with comfort and sound pack I was surprised / confused that it appeared I didn’t have the virtual pedal or under bumper gesture control to open the boot lid. Have just had the car serviced and in the paperwork was an AUTEL report showing which codes the car had thrown up. Every code had a status of “Passive / Sporadic” which apparently means these have been in the system but are no longer active and can be cleared. However one DTC (diagnostic trouble code) was showing as “active /  static” meaning it’s still an issue. The code in question U115200, description “Trunk Lid opener control unit, No communication” which I’m now thinking is the gesture module as my boot opens faultlessly via any other means (switch in car, double tap on fob, button on bootlid). Have any other Avant owners had this issue and if so what was the cause / fix? Cheers. 

Makes me wonder if the car has had a rear end bump and the boot/bumper not been fitted with the correct parts. 

1 hour ago, Steve Q said:

Makes me wonder if the car has had a rear end bump and the boot/bumper not been fitted with the correct parts. 

Yep could also explain it. I’m hoping it’s something more “innocent” like a corroded connector though. 🤞🏼 Will get around to investigating and report back. 

Keep us posted on how you get on