W129 280sel euro 1984 transmission

Yes. I have a w126. My iphone typed the wrong number. Anyway, what do you mean about the differential? Is my transmission not shifting into 5th or do I not have a fifth gear? I wish I had for those high rpms on the highway.

thanks for your help.

Dan

Thanks for the responses. What kind of gas mileage should I expect? I am getting around 17mpg. How can I improve that or is that normal? Also, any suggestions as to what spark plugs, distributor cap, rotor and wires I should use for my m110 engine? And do you guys get like a harmonic humming noise around 65-70 mph? Also, I am interested in changing my odometer back to the classic speedometer. Is it hard to get the dash out. My clock doesn't work either.

Thanks!

Dan