Not sure I trust my local Toyota Main Dealer. Brought my car in for them to have a look at the AirCon which was tripping out. First they told me that they could find nothing wrong with it. Then they said that they'd filled it with gas and dye and had found a small leak on an o-ring on one side and quoted me over 400 quid to fix it ! Sounds like a very expensive o-ring ! Should I try somewhere else for a second opinion ? .