Hi, i recently purchased a 52 plate diesel ghia and have issues with the Parking sensors amd air con. I also found that a lot of the buttons on the dash did not move, i just pushed very hard and they worked normally from then on, it apperas they get stuck if not used for a long time. Give it a try. My parking sensor system was dead, turned out the control unit under the front passenger seat had been disconnected? I suspected that the rear wash pipe had come loose at some point and flooded it, the the rear wash works now so i guess this was fixed. I reconnected the control unit and all sensors on the rear were clicking, but only 3 out of 4 on the front, easy fix i thought! I popped of the rub strip from the one corner of the front bumper to find the fault, the clip that holds the connector in had broken so i just taped it together and put it all back. Checked the system and all front ones now clicking, but now the entire rear system is dead!! Not sure how that happened? Also my Climate control does not work, i got a mobile aircon specialist out who seemed to know his stuff and spotted what was wrong in about 5 seconds. One of the pipes had split hence the system being empty, guy quoted