Can anyone tell me the size of the tool needed to remove these?

They're the triple square from my memory.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

It costs about $25 at the dealer and is well worth . Any after market tools will destroy the bolt when you will torque them.
P/N 617 589 00 10 00

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New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

12M . . . I've used an "aftermarket" driver for years without harm.

I too subscribe for the MB tool or FACOM.

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Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).

E-class, W210 320CDI, 2000[/B], 225 000km, Sold

Why would you reuse the same head bolts? Aren't they one use items?

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

No. They are only replaced if stretched beyond spec.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Hitman, yeah, they are the 12mm,12-point torx type.
Do not even try to use a 6-point torx!!!!
Pep boys sells a set that has the correct size.
But, as stated above, those head bolts are on REALLY tight if they are original. So, the cheapie Chinese tool might fail.
Here's a tip; when you are loosening them, take a strong pull on the wrench, then have a buddy tap the top of the breakover bar with a large hammer.
They are screwed into the iron block, so you won't hurt anything, and the tap helps break them loose. Kinda like a Vessel hammer-impact driver we used on motorcycle case bolts.
When re-installing the bolts, be sure to check and oil the washers under the bolts (new bolts have washers built-in). If not, they will gall when you pull them down (personal experience).

DG

Picked it up for $19, gotta love half price days.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]