I have had an A4 Avant Quattro 3.0d for 8 years, and it’s the best car I’ve ever had, better than three Mercs and a Range Rover that I’ve owned. I love it! But I’m having the famous Adblue problem for the second time. The first time it cleared itself, but this time I got down to ‘150 miles before no re start’. My local Audi dealer has quoted me £2.5k to replace the tank and sensor, but warns that this may note solvent the whole problem, because there are other potential faults in the system. How come they can’t diagnose the actual problem. How much could this end up costing, and is it worth doing?
