I've had the car 11 years and think the load leveling has never worked. The rear is very low. The lever on the sway bar is tight and adjusted properly. Right rear shock leaks and it appears that the control valve does not work. The car is not worth putting another $1000 in shocks and valve. Does anyone know of any aftermarket springs/shocks to replace the load leveler? newmercedesparts.com lists a KYB Gas-A-Just, but I think it might be a mistake, since KYB does not list a shock for a 300TD on thier website.