Thoughts:

I recall, this car had the head replaced before?  Or was it just the
head gasket?

On removal of the head, I would inspect carefully for any evidence of
cavitation, with a weep hole in a cylinder wall, block crack, or other
leak path, while the head is being checked.

Open once.. check twice..

On 3/3/15, Fred Moir via Mercedes <mercedes@okiebenz.com> wrote:
> Dimitri.WARNING.
> This is just an opinion.The head probably will not have been re-engineered
> to accept different types of bolts.The bolts went from torque-to-spec to
> torque to yield. In effect the old bolts became rigid under tension and the
> later ones retained some "springy-ness"Provided that the used 12 point bolts
> are within spec and not cracked, I'd re-use them after cleaning the block
> threads thoroughly and hand fitting them to ensure smooth fitment.Have you
> matched the head/gaskets to the olde and new parts?YMMV.
>
> Fred Moir.Lynn MA.Diesel preferred.
>
>> Date: Tue, 3 Mar 2015 12:08:48 -0500
>> To: dsereta...@yahoo.com; mercedes@okiebenz.com
>> Subject: Re: [MBZ] Fwd:  Overheating 240D more info
>> From: mercedes@okiebenz.com
>>
>> Any thoughts?
>>
>> Sent from my iPhone
>>
>> > On Mar 2, 2015, at 8:21 PM, dseretakis--- via Mercedes
>> > <mercedes@okiebenz.com> wrote:
>> >
>> > Does anyone know if I can use cylinder head that came from engine with
>> > 12 point head bolts on an engine which uses hex cylinder head bolts?
>> > Shop manual says that hex head bolts must be used in engine that came
>> > with such bolts but unclear if head from newer engines can be placed on
>> > old engine.
>> >
>                                       
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