I had the same issue on the driver's door of my W124. I didn't have any adhesives on hand (and didn't feel like masking off the area for a spray adhesive)... so I had a fairly new tube of black, hi-temp silicone sealant on hand. I smeared a thin layer on the rubber seal, then pulled the fabric over it. I used some painter's tape to hold the cloth down, then shut the door. 5 hours later, I opened the door, removed the tape and it held. That was six weeks ago and we've had some blistering hot days here in the South East. Hasn't come undone yet. YMMV

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1991 300D 2.5 "Rocinante"
2002 Golf TDI "Teen Spirit"
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1984 300D
1966 Mustang I6 3sp
1985 Mazda RX-7 GSLSE
1982 Toyota Supra
1977 Datsun 280z
1971 Datsun 240z