I've also had air-adjustable dampers on a Vauxhall and a number of Volvos have used the same system with either manual adjustment from an air line or fully automatic with onboard compressor to give self-levelling rear suspension.
Haven't seen air on a Volvo, newer ones out of my budget, i had older RWD 7 & 9 with self levelling rears, self contained (Boge iirc) dampers, simple as can be, the car would squat as you loaded it, by the time you'd driven it a few hundred yardsor even bounced it by hand the dampers had pumped themselves up to normal ride height, the damper effectively a second spring ....interestingly the non self levelling estate's rear springs were stronger rate than the those self levelling damper assisted models.
As an aside i wonder then if the self levellers had better ride quality when unladen as a result, i don't know cos the estates i had were SL's.
A sight simpler system than all the pipe work and plumbing some use, new self levelling damper units seemed expensive when they wore, but compared to the 4 figure sums involved in overhauling air/hydraulic pumped self levellers they were cheap as chips.
Example...MB's with air suspension new dampers alone are around a grand a corner, luckily the do last a long time and recently overhauled units have finally become available, not from your MB palace mind, enough potential expense and worry to put me off considering one anyway.
Edited by gordonbennet on 01/07/2011 at 11:22
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