Hello All,

My current problem applies to a 1991 300CE-24 with 104 engine and 722.5 5-speed auto box.

Auto box is misbehaving.

1. Starts fine, up changes quite smoothly and at correct speeds.

2. At the 3 to 4 up-change point, it engages 4th for about half a second then changes to 5th.

3. Switching from D to 4th with the lever has no effect, it remains in 5th.

4. Down-changes are very slow and only happen when very low road speed is reached.

5. Manual selection of 3rd results in 3rd being selected after around 2 seconds (very slowly). If

left in 3rd, it behaves musch as it should short of being reluctant to select 2nd except at very

low road speeds.

6. Kick down (foot flat to the floor) results in 2 or 3 seconds of 'thought' and then off we go!

So, basically, everything seems to work but in some cases completely at the wrong time.

My feeling is that this is a vacuum related thing. It's as if the gearbox is entirely unaware of

the position of the accelerator and thus when I am hoping for a down-change.

If anyone can shed any light on this, I should be forever endebted.

My thanks in advance and regards to all.

RayH