Thanks ... great ideas.
I have already bought a 3/8 socket set with allen heads ... pretty long so I may simply cut off extra length ... the special tool looks like a "stubby" version of what I have, except it is in 1/2 drive, I think.
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg