Hi. My fuel gauge on my 2007 A6 2.7 TDI QUATTRO is playing up, over the last few months it works perfectly and then for some time it shows 0 miles on display and the gauge shows empty. I had it in the garage a few days ago to be diagnosed. The garage says after the diagnostic report , found short circuit in fuel send units - this is a saddle tank unit . Both fuel pumps senders require replacing VW/ Audi part only . They quoted me £485.74 parts , labour and VAT . When it went to the garage the gauge wasn’t working but since i got it back it’s working perfectly at present . Any thoughts ?/