John, The cream cover is indeed an adjuster, though it only allows about a quarter turn in each direction. This was intended as a means to keep the ininitiated from messing with things they shouldn't touch without the secret handshake :^)
If you pry this cover off, you will see the metal T adjuster that most of the manuals refer to. It will allow you much more adjustability. I would warn that you really should have a gauge hooked up to the transmission when you adjust this. It' really pretty easy to make one. Saves a lot of guesswork and potential harm if you get things too far from optimum. There's a service port on the transmission that is intended for modulator pressure measurements. I know a lot of people have been successful with adjusting modulator pressure by the seat of the pants, but I've also seen cars where the pressure was so far out you'd hear a big clunk from the driveshaft every time it shifted. Turned out someone had been monkeying with the modulator pressure when the problem was really a combination of vacuum leaks and a misadjusted vacuum switch. Gary Thompson 1995 E320 On 4/20/07, John Peterson <[EMAIL PROTECTED]> wrote:
I put a photo of my modulator at www.immersionstudio.com/mod.jpg It has a cream colored cover that looks like it might be an adjusting knob- I turn it but see no difference in shift firmness. I don't want to pry it off if it is not a cover! This is a MB refurb transmission. Any input? John Peterson 1991 300D 2.5 87k Kingston RI
