I have a 2006 A4 B7 2.0TDi SOHC convertible. I cannot for the life of me find the temperature sensor. It is the one that sends signals to the ECU I mean, usually green or grey and apparently either two or four pins. I have the Haynes manual for the convertible which doesn't cover diesels, and the manual for the diesel saloon but that only covers DOHC so is completely different to what I have. Everywhere I look it says it is at the back of the engine and takes minutes to replace but I still cannot see it!!

Any help or preferably pictures/diagrams would be greatly appreciated!!