I'm trying to take the head off my 99 300TD. The cam cap bolts are a bit strange and I see no mention of what they are nor special tools.
These are 12 point heads that measure 10 mm across the points. I'm thinking a 9 mm 12 point socket may do the trick.
Anybody have any ideal what these are??

Yes, I guess I have a blown head gasket. No 1 cyl is low about 320 psi but leaks down quickly. The others are happy at 430 psi.

I'm gonna guess that you need the famous MB "tripple Square" wrench.
if there's an autozone or O'rileys nearby, they have a set of 3 or 4 for around 5.00
not the best quality, but they were sufficient to remove two heads off my 617's I have.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Don't you have a 12-point socket set? (most socket sets are)

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

The tool you need is called an XZN M10 Wrench, the M-B PN is 601 589 00 10 00 or you can buy a generic like this one:

http://cgi.ebay.com/ebaymotors/M10-XZN-VW-Volkswagen-Audi-Golf-Jetta-Head-bolt-Tools_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247QQcategoryZ43998QQihZ007QQitemZ170200085758QQrdZ 1QQsspagenameZWD1V

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

No, it isn't the triple square socket. The OP is asking about CAM bearing bolts. These are ordinary 12 point metric bolts, the head is effectively a double hex. Ordinary 12 point metric sockets are all that's required.

Of course, the cylinder head bolts ARE triple square, but, the OP isn't at that stage yet!