Thank You for the info. When changing old left accumulator some bubbly white liquid came out of it. Old Righ accumulator did not expel anything. With new accumulators suspension dropped about 1 inch but it has raised only about half of that. Pump is good; there are no leaks on the lines or the hydraulic shocks. Car was riding very hard and very bouncy. After new accumulators suspension smoothed out some but it is still hard although not as bouncy as before; there still is a hard knock in the rear suspension going over bumps as well. You cannot bounce the rear shocks by pushing down the rear as you can do in my regular shocks 420 SE. Is it possible that previous owner might have set the rear suspension height lever to the lowest setting when he installed 16" rims andf R rated tires? A Mercedes indy suggested I loosen the top hydraulic hose connection at the shock until liquid expels to let out air? How do I adjust the rear suspension to regain some height? My previous experience with a 6.9 I owned was different; upon changing all 5 accumulators the car rode like a dream.