Air con problems on my 2008 sline avant 2litre tdi. I was told the air con pressure switch was at fault and it was an easy fix. Got the part from Audi with a new "O" ring as well, looked to fit the part and it looks to me like it will be a bumper off job. Anybody done this before and got any pics of the job as a guideline for me to follow I would be very grateful. thanks in advance.