85 380SL. Transmission seems to work fine except for engagement. There is a 4-5 second delay before the transmission catches when moving into D from P or N. There is a similiar delay, maybe a bit longer when shifting between R & D in either direction. Did a search, several others have asked a similiar question with no response. Is this normal? I recently purchased the car, will be dropping the pan to change the trans filter this weekend. Anything else I should be checking while I'm in there? On my prepurchase inspection the oil level was correct. The fluid was dirty, but not burnt. Could dirty fluid be the problem? I know about half the fluid resides in the torque converter. Is it possible to drain it? Anything external to the transmission that I should be checking. Thanks for the help.