This was posted by M.B.DOC on a previous thread:
To make the car shift sooner you do adjust the control pressure (bowden) cable, you will need to allow several MM clearance at the throttle linkage. However to change the shift firmness you will need to adjust the vacuum modulator on the transmission.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".