Greetings Diesel Fans,

Perhaps someonecan help me with an ongoing problem with my D300 Turbo Diesel (Der Panzer).Thevacuum diaphragms inthecabin's environmentalcontrol valvessystem fail frequently. This causes more problems than just hot-air being blown from air vents with the AC on,it also prevents the engine from shutting down.I bought the car new and havereplaced the environmental vent control valves every-third year since 1985. The last time it failed (Thursday, 01 May 2008), I just bypassed the vacuum regulator and control valves. Two-Questions:

1. Does anyone know if bypassing the system will cause a problem down-stream?
2. Does anyone know if there is an after market replacement for the vacuum regulator and environmental valve control system?

(PS: Since bypassing the environmental control, the transmission inthe Panzer now up-shifts and down-shifts without a humongous delay.)


-Oncdoc-