This is an awesome thread! I just picked up a vacuum tester yesterday and will begin working through the solutions here this afternoon. I have an 83 240d with all shifts done by 20mph and no kickdown. I'll bet the answer is in this thread.
Thanks to all who have contributed to make this a great forum
BTW, I tried approaching my local MB stealership for info about the car(which I imported from the USA) and as soon as they eyballed the VIN, I was politely but very firmly told "contact MB USA" as they had no info whatsoever. Is that just a miserable local dealer or a MB Canada policy of being awkward about imports? Makes me not wanna give them any business....