Double sided tape for me too. Never had an issue with it buy get good quality stuff like 3m.
Do not super glue them. I had a 300c where the previous owned blinged it up like a Bentley :roll: . He super glued Bentley badges on and I tried everything to get them off but couldn't without damaging the paint/body work. Ended up just painting over them and sticking something else over the B.