I've baked a dozen or more lights in my days and I cannot get these open no matter what which is a huge bummer because OEM replacements are so pricey. I have had them in for 30 minutes at 220 and I can't get any of it to pry open. Which is odd because it looks and feels like butyl seal. My tool I use even pushed through the back side of the plastic housing.

My E38 took 5 minutes and my E39's only took 15. Even my Volvo only took 10-15 min. Very annoying.