Hi TPS are not helpful anymore same as Audi main dealers, if its the cooler thats in the DPF NRG do a cooler online thats about £250 and the valve is about £160 vs just under £500 for the cooler and £370 for the valve from TPS.
Hi Terry, if the 12v socket wasn’t installed from factory it’s very unlikely the wiring will be there - mine wasn’t. I got Audi Upgrades to fit it in the car end - did a great job.