W211 Folding Mirror repair - Tamper torq-bit size ?

[M.G.]

Hi Folks,

I'm trying to remove the three tore-bit screws that secure the main flange of the door mirror housing to the door frame -
Problem is my standard Torq-bit tool ( does not fit ) as they are 6 sided -
My screws look to be 5 sided! ( with the tamper proof centre pip )
So are they *torq bits* i.e. TX's or are they called something else ?
they seem to be around size T20 or T25
Any help much appreciated
Regards M.G.

Vehicle being repaired - E320 CDI 2005

 

[LostKiwi]

Here you go:
http://www.screwfix.com/p/laser-torx-bit-set-23pcs/1414f