Not sure this is an issue or not, but recently when first starting out, my 93 300D 2.5T, (138K miles) really revs high before shifting to top gear and seems reluctant to drop into the high gear. It just kind of hangs in 3rd or whatever the next to high gear is at around 2800-3000 RPM. I play with the footfeed and it still is reluctant and then finally will shift. Seems to shift through the other gears OK. No slippage or real slow gear changes when it does shift, just seems reluctant to go into high. Also seems to shift more normal after the car warms up. It only seems to be a problem from first trips of the day on colder mornings. Anything to be looking for or worrisome here?