1992 300E with 44,000. I bought the car about a year ago with 35,000 miles. On cold start idle stumbles but does not die but very low idle about 500rpm or less. Becomes normal very quickly. Then the tranny does not upshift like it did before. I have to drive 4 or 5 blocks before it upshifts and then all OK.
After purchase, replaced injectors, seals, ignition wires, rotor/cap, temperature sensor and the OPR. Engine ran perfect until now. I have to drive 4 or 5 blocks before it upshifts and then all OK. All thoughts and knowledge appreciated.

__________________
Handyjay