Well i had my mechanic look at the AC and he has discovered a belt is missing - I assume this is not good as even if the previous owner removed it for "economy" reasons it could also mean the pump is goosed - is this going to be a leave it alone and open the sunroof thing or would it be worth my while getting a belt and testing it? and if so (assuming there is only one) is it easy to get on or again should I just open the roof