I have a '92 E300D Turbo Diesel. A while back, the diaphram in the shift modulator split and the engine ingested a healthy dose of ATF thereby melting the pre-chambers and valves out of 2&3. After lots of parts and finally getting it all back together, I once again have a wonderful car! I also replaced the modulator and serviced the tranny while I had everything else apart!! I adjusted the shift firmness and everything was fine. 10k miles later, it's not wanting to shift normally into fourth, especially cold. You have to bump it into neutral briefly and back into "D" again to make it shift. It seems to do a little better the harder you drive it though!? Am I missing something really simple here? Do you have any ideas that may help? I sure could use a little boost on this one. Thanks, Edwin.