aklim,

Sorry for being hard to understand. The prechamber on the 606 may be different than it is on the 616 (240D) so this may not be exactly accurate but I have no reason to suspect it is vastly different. Someone with more specific information will have to speak up if that is the case. On the older engines the prechamber is a separate part that is pressed into the head and then locked in place with a threaded locking ring. The injector threads into the prechamber along the axis the unit was installed into the head. The glow plug comes in from the side and through a hole in the prechamber that lines up with a hole in the head for that purpose. You get them out by removing the injector, the locking ring and using a prechamber puller tool from MB. The are installed using the same basic tool. Hope this clears things up a little. Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)