My C5 2.0 HDI LX is higher than it should be when it is on normal ride setting. The hydractive pump is working fine, it goes up and down ok on all settings and adjusts as it should when I get in and out of the car. The problem is that compared to all the other C5 cars I have seen mine is definatley higher on the normal drive setting, probably about 15-20cm higher. Is there any way to adjust the ride height or is it a garage job?