Sounds like it has something in common with the mercedes 6.9er in that if the suspension craps out the car is toast. I hear on the mercedes it is like 5000$ to rebuild the hydraulic suspension if you can find someone who knows what they are doing.
You see DS around periodically but never SM. For all the jokes and stuff about the french it is obvious they take engineering pretty seriously. Thanks, now I want one! The DS is so quirky looking it stands alone, you aren't going to mistake it for something else in the parking lot.

