Tried the other day to take off only the Maf sensor for cleaning it but screws holding the sensor on maf body,at least to my car, are quite peculiar.Both head of the screw and the hole in the center of the head are completely rounded.So typically cannot be unscrewed without damaging them unless if there is any special tool or simply the sensor cannot be separated from the maf body?

Any ideas ?????

Possibly a security Torx bit

Click image to enlarge

It is possible to get them out with a pair of long nose pliers if you are stuck, just takes a few goes to get enough purchase on the thin edge of the screw head. I always swap them for standard head screws, they only go into plastic so self tappers do the job. All Bosch mafs seem to be the same, never understood why security screws are needed.
 2007 TDV8 VSE
2003 TD6 gone.
2002 P38a gone
1999 P38a gone
1997 p38a gone
1993 VSE gone
1992 VSE gone
1966 Series 2a with V8 conversion gone

Thanks for your replies.Just wanted to ensure that i can separate maf sensor from body.Believe will manage to find a way to to do it even by damaging screws head which i will substitute with a more common type.

Finally maf removed without damaging screws.Needed tool 5 sided security torx/star instead of the usual one with 6 edges?