Apologies if this is a repeat post which im sure this issue maybe..but im on a mobile and cant really do thorough searches on forums on a mobile phone at 3:30 am on the side of a dual carriageway!

cutting most of this short ive been told by an AA tow driver that it maybe a brake light switch.
Can a simple switch really cause all this ****?? :

Loss of power
Glow plug flashing light
Limp Mode/no acceleration
ESP light
brake lights permanently on ??

I thought my turbo had gone initially...but nothing is smoking out the back.
, none of the tail lights or healights are dimming so i dont think it would be the alternator. I will obv have it run through a diagnostics later on this morning by AA first off to find out what it is bringing up code wise if anything... but ffs if it turns out to be brake light switch why can't audi spend more of their money on making sure simple things dont break and cause electrical chaos!

Im hoping it is that and not some failing ECU problem etc

I love audi but i also hate them.

 

Most cars here are US market so probably not much support for you as you have diesel.

I'm gonna at least say start with coil packs though. And no a taillight switch will not cause a power loss although I have senn that switch go bad on a few cars cauing the tails to stay on. Could be coincidence 2 things went wrong at the same time.