Hello together I have also been in possession of a Phaeton since not too long time. (2011 V6 Diesel) As one of the first steps I recoded the heater to the preheater by means of VCDS. The valve for the cooling liquid of course also out of coded. Unfortunately, the preheater does not work. It always stops with the fault after the high time. I tested everything and all actuators can be heard clearly and with de r Glow candle changes the value. Only the dosing pump doesn’t make a sound. Therefore my question: Where is the dosing pump and can I get there with not too much effort to test the times, so that I can see if it is broken or the cable is added. Or are there still other sources of error? Thank you in advance and best regards Severin