I have four door panels on the '87 190E 2.3 that have the dreaded MB tex problem.
Pulled them all off, used a heat gun to stretch the vinyl and then reattached with 3M Automotive contact cement (the yellow stuff). One panel had parts along the windowsill come off right away, two are holding and the fourth is going on the car this weekend.
I found that using only one application of the contact cement, not the one and let dry and then apply a second coat wet and attach per the 3M instructions does not work well on this application.
If I go looking for panels, new or used, I will carefully take note on how the vinyl is attached and how much material has been stretched over and on to the inside (door side) before purchasing them.
Frankly this amazes me. Mercedes has known for years that this is a problem.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)