Thanks for the info. Rear levelling shocks are leaking slightly, still working properly though. Front shocks have no leaks, but are weak. Front end dives when applying brakes. Maybe just do the fronts? No traction light indicator comes on. I was going to treat both front and rears as maintanance items and replace. I plan to do it myself anyway and am looking for pointers as I haven't done it before. Suggestions? ( Car has 127,500 miles FYI, well cared for.) Mike