I was wondering ... doesn't this car have a vacuum modulator on the left side of the trans?

If so, check tube connection at the modulator (especially the rubber tube that connects the two, and the modulator itself.

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)