I have done a search and read a lot about the bowden cable, but this appears to apply only to diesels.

My 380SE shifts so early that I have to nail it if I want it to hold in gear for any length of time. This gets tedious and doesn't make for great gas mileage. Shifting manually is not an option.

How can I adjust the shift points so it holds in gear longer?

TIA

__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280