Hydropneumatic suspension: cost reputation versus reality

The 6.9's unique all-four-corner hydropneumatic suspension is the car's defining complication and the biggest source of price hesitation. Some warn it is very expensive to touch with parts that cannot be found; defenders counter that the bad reputation is undeserved and the system is extremely reliable once a neglected car is sorted, with a full four-corner rebuild quoted at roughly 20 hours of labor plus parts. …