No glue. No need for it, the space is tight and each heater finger will not move after it is fished thru. You may want to confirm that heated seats was an option for MB Tex upholstery if you haven't already.When you first removed the element from the seat, were they glued onto the padding? Were there any signs of glue on them? I am trying to figure out how to get this done before having the seats removed again.