I've drilled the studs out on a few occasionsso you shouldn't just jam a flat head screwdriver in there .... ???
this is the right answer. it's not just security torx cause those can come in 6 star but these are 5 star. bought 2 set to finally find out. makes no difference if it was a philip or flat head. crazy germans, lolThey are 5 sided security/tamperproof Torx. I have a set used once on a CLK320 many years ago.
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Look exacty the same but different ..... the op's picture definitely shows just 5 lobesThose look look like standard torx security with 6 lobes.