Glad you got sorted and the forum helped you 🙂 

Ayoop folks, we took her out for a run (breakdown services unknowingly on standby!) and put her through her paces on comfort setting, so roundabouts, fast exits from junctions etc and all seems good......I kinda wonder what's going to sulk next, but I'll cross that bridge when I get to it. In the meantime, the fuel gauge isn't working and I sometimes can get it to work by folding down the offside rear passenger seat, or placing something heavy on the seat cushion. I wonder if this means a wiring fault as opposed to a failed(ing) sender unit. As I rarely use the performance, 600 miles between refills is what I go with, but the range data would be nice to have again.....thanks again everyone. 

Recently had a friend that was having a similar issue.....
Same kind of car, came out of a roundabout and heard something "Pop".  Told himself he hit a stone or something and thought no more of it until he said the "Ride got stiffer and bumpier" as he went along.

Got about 15 mins from my place and gave me a call! I went down and there he was sitting lower than my D3 A8.

Jack out, wouldnt fit under the car....  Wooden blocks out and drove up onto them to get the jack under the front end.  
Turned out his suspension link (Bottom arm to ride height sensor) decided that it no longer wanted to be connected at both ends.....  And the little Ball joint that it connects into was broken and half of it was in the suspension link itself.
Into my little box of tricks and i pull out a little bag full of small ball joint fittings, a 9mm spanner and a 10mm spanner.  Remove whats left on his lower arm and replace it with a new one! a bit of fiddling and cursing and i got the ball out of the link bushion and popped it back onto the new ball joint! 
Bingo hes back in action! 

He had been pricing new struts, new compressors and all sorts while i was on the way to him and he was a very dejected man when i handed him my keys and told him to go get us a coffee while i had a look!!!!!

When he arrived back and i told him i had a diagnosis and a price for him to be back on the road he looked like he was going to have a stroke!!!! I told him it wasnt as bad as he thought and told him he would be back on the road in about 15 mins and for the price of "Free" and i thought he was going to drop in front of me!

I always tell people when theres a problem like this, not to think of worst case straight off as often there is a simple enough solution! 

Well, ya know how it is when you've had......2 rear air bags, 2 alternators, a battery, a headlamp leveling control module, a crankshaft vibration damper and a serpentine tensioner pulley, you sorta reckon it's gonna be the most expensive repair there is.... the part that went south( literally in this case!) was the ball joint joint and the rod was rusted so thin I was able to bend it with finger pressure. I have a respectable collection of bits myself but nothing that could do the job needed. Good story anyway, cheers. 

Oh i understand that pal,  i have had cars in the past that the only thing that it never broke on me was the speed limit!!!!
Im just glad you got sorted! 

Well she's still sitting level so no leaks yet......damn,I just had to say that......we shall see. For the moment all seems OK. I have no doubt I'll be back with other sob stories 🤣