We are another victim of the 48v electrical system failure - in December whilst on the M62 “smart” motorway we got the yellow electrical failure warning. Soon after the windows started misting up. We continued, not realising what the issue could be, until a red warning came on to tell us to stop the car and a Christmas tree of warning lights followed within about 30 seconds of the red light. Luckily we were in slow moving traffic & just at an exit - we managed to get off the motorway and stop on the slip road hard shoulder. Power steering had gone and all instrument clusters went black - very scary stuff, particularly as the last few miles had no hard shoulder.
Got recovered by AA and taken home - next morning no warning lights, and car apparently working fine. Took it to JCT Audi York and told the 12v battery needed replacing as it had spent too long below 12v. Told them about the threads, the US class action and extended warranties - also said we didn’t believe the fault could just be the 12v. They wouldn’t move past changing the battery though, so we did this (£600 inc vat). They kept it for some time to put some miles on it to check the battery was working okay, and we got the car back about a month later.
The very next day - first journey on M62 to Manchester airport and yellow electrical failure warning came on again after about 60 miles - this time right on the tops. Pulled off, got out for 10 mins but decided to continue with the light on. Air con stayed on, which was a relief & we got to our destination. Next morning, no warning lights, car working ’normally’. Left it at airport for a week and drove home last night - no warning lights, but not sure if that’s because I made my husband stop at hartshead services (in my muddled mind for it to reset itself).
Car is now back at Audi York & we’re waiting for the report. We’ve got a nice non 48v A5 coupe as a courtesy - I would like to keep this!
12 months ago the same car spent a month at Audi York having the entire adblu system replaced at a cost of £3500 - Audi covered all bar £500 after we spoke to Audi uk and managed to persuade them that this shouldn’t need replacing in a 5 year old car with only 45k miles on the clock. We joke that January is its annual month at the workshop, but honestly it’s infuriating and worrying what this will end up costing us and what might go wrong next. I myself will not drive this car again - it scares me and scares me that my husband will drive it (he’s off to Manc airport again on Saturday….)
I’ve been pouring over this thread today and I see a lot of these issues with Q7s and RS6s, but not so many A6s - has anyone had any luck with extended warranties or goodwill gestures on this model?