I have a Mercedes 300E 2.6 from 1991, 240K miles. When I turn the key and start driving the car right away, it takes too long to change shift to second. If I turn the key and wait 5 min, the car runs fine. 3 months ago I changed the A/T fluid which was not a Mercedes brand (Dextron 3). Could that be it, or is it another problem.
Thanks,