I have just updated my W210 E320 CDi Avantguard Estate from a 1999 to a 2002 Model.
Both fitted with the 5 speed Tiptronic Gearbox
On my 1999 the car would go into 5th gear at about 32 mph.
On the new one it waits until 44 mph to go into 5th.
I have carefully checked this with a fully warm engine.
Anyone think of a reason ???