Mercedes Benz repair: Mercedes Benz 230 w115 series, mercedes benz 230, mercedes benz

Question
How do I change the gear oil on the above model.Car has been standing for long gears a bit sticky especially 3rd and 4th.

Answer
Greetings!
On that car you should find a 14 mm allen near or on the bottom of the gearbox. You also want to put transmission fluid(dexron111) in that gearbox. That will ease the shifting on it. We done it for years and it works great!I think the book even calls for it. 90wt gearoil makes them to hard to change gears, aepecially when there cold. Thanks and i hope this helps. Rick