300TE 4Matic
 

Need help TRANSMISSION problem. From a dead stop in Drive the trans shifts "up" very fast and I am in 4th gear at 15-20mph. If I manually start in 3rd gear I can build up momentum and manually shift to 4th at my discreation. Went to local MB dlr and the Bowden cable was checked out ok. They say it's in the transmission and will be big bucks to fix. Have 205000 on the odometer Thanks in advance JOE