This winter, when im home for winter break, i was thinking of changing the glowplugs, and since ill have the intake manifold out of the way, im looking for any advice in other parts that need to be checked and or replaced.

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2002 G500 74K
1998 E300 200K and rising
1995 S600 73k


"Some people spend an entire lifetime wondering
if they've made a difference. The Marines don't
have that problem."-Ronald Reagan

"Never tell people how to do things. Tell them
what to do and they will surprise you with their
ingenuity."-General George S. Patton

I worked 40 years to be able to afford to drive a Mercedes and you get to drive one to collage!! Maybe if I would have graduated from collage i could have afforded one sooner, but i'am happy for you. Do a search, their is a lot of info on this. I had mine changed at 80+ miles when one went bad.

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1998 E300Turbodiesel
1980 300d

Ready- Ronnie

W140 S600,

The search function will find some posts on the subject. For the most part the removal of the intake manifold is the most time consuming step, however, there are a number of posts on the subject of these glow plugs being broken off in the head. When this happens the fix is to remove the head and drill the remnant out without damaging the head. The problem lies in the new glow plug configuration and how they fail. When the glow plug fails it gets stuck in the head, and twisting too hard on the hex on the outside leads to having the outside of the plug snap off in the wrench.

In the end, it is probably not a good idea to change plugs if they are working ok. 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)

Ready-ronnie: What exactly is a "collage?"

This is one of the extremely rare times I disagree with Jim. I think that the longer the plugs stay in place, the more likely they are to get stuck.

Just be careful removing them, and don't twist too hard if it feels like one is stuck. Lightman posted a great thread with lots of pictures detailing the process.

While you're in there, I would suggest replacing all the plastic fuel lines. They are prone to leakage and aren't terribly expensive.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References

I said i did not graduate. By the way "collage" by definition is an art form in which bits of objects are pasted on a surface so now you learned something.

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1998 E300Turbodiesel
1980 300d

Ready- Ronnie