Originally Posted by pmckechnie

When I got my 500SEL the vacuum pump was missing from the trunk. The replacement I needed was unavailable (cost wise). The car has orthopedic (sp) seats which use the same pump. I ordered a door lock kit from JC Whitney which is designed for cars without power locks. I forget the cost but it was less than $100.00 for a 4 door car. The conversion was fairly easy as the actuators simply replaced the vacuum pods. I latter added keyless entry and every thing works great. I know this doesn't solve all your problems but it will make a good start.