I have a friend who has a w115 240d that accelerates faster then my w123 240d he said it was because of a kickdown or kickback switch (i forgot the name) so i was curious is that the reason, if so is it bad for the engine? and if its not the switch then what could be the other reason?

__________________
1974 240d
1983 240d -sold
1989 420sel with om606
1994 s350 turbodiesel - sold

A kickdown switch is a switch that shifts the car into a lower gear when the accelerator is jammed to the floor. I've never driven an auto 240D so I don't know if they have one, but I have never driven an automatic transmission that didn't have a kickdown switch or some method of kickdown, both my automatic 5cyl MB diesels had them.

It is what allows you to maintain speed when going up a steep hill when you are loosing momentum, for example.

Perhaps yours needs to be repaired if your car does not downshift when you stomp on the accelerator.

However, I have heard before that the 115s were more nimble than the w123 because they were lighter. Really, I think there could be a lot of factors behind why one is faster than the other.

If you use the search feature on this forum, you will find TONS of info about setting these cars up for optimal acceleration. Really the possible reasons are too numerous to go into without more specific info.

__________________

hmm ill have to look into that, thanks for the info

__________________
1974 240d
1983 240d -sold
1989 420sel with om606
1994 s350 turbodiesel - sold