If you are talking about the rubber trim 2 1/2 to 3 inches wide at the lower part of the doors you can buy trim adheasive from any auto parts store and carefully reglue it into place.If you try to use a double sided foam tape it will not look right. The foam tape will be visible and the trim will protrude too much from the doors.On my 90 240 the trim started to unglue from the front door edge[on the lock side not the hindge side]. I used some trim glue,just poured a little behind the trim and taped it[blue tape] down for a day,this was 2 years ago and still holding. The trim is only available I think from the dealer.Try to glue the trim without removing it from the car.Try to carefully remove any old glue that is on the trim and the door.Clean it well ,then glue it.Good luck,
Nelson