I am an original owner of a 2000 ML320 with 80,000 miles. CEL codes P0170 & P0173 (fuel trim malfuction, left & right) were posted. No driveability problems. After researching, I decided to replace the MAF sensor & disconnected the battery for 30 minutes to drop the codes. I did not have the engine adaptations redone since the engine was running fine. I'm now starting to have rough shifting problems between 1&2 and 2&3 on medium and fast acceleration. Problem seems to get better after running for awhile, but still not real smooth. Tried shutting down & restarting, but no real effect. Transmission fluid & filter were changed at 75,000 by professionals. I did a 3,000 mile trip since the fluid change with no apparent shifting problems. There are no apparent leaks. Is there a relationship between not doing the engine adaptations and the rough shift problems or am I facing another problem with the ML320 transmission now? If a new problem, any suggestions from a troubleshooting point of view? Thanks