Ok guys, here's the problem.

Out of the blue, the tranny started slipping taking off from a dead stop. Once the vehicle is in motion, the transmission shifts normaly up and down through the gears until coming again to a complete stop. When stopped, you can feather the throttle and it will catch and allow you to s l o w l y take off.

Fluid is on the hi mark and clean. Car has 157k on it. Today, I added a bit of Lucas Tranny Fix to it and it helped some. Taking off, the tranny would catch and shudder until rolling then everything was as normal.

Talked to my local Benz mechanic [sic] about changing the B2 Piston and modulator and was informed he only puts in rebuilt units as working on one is too hard.

So any suggestions? B2 piston, mod valve, oil filer change?