Take an old bad glow plug and a dremel type-cutting wheel and cut gouges in to
the old glow plug
something like this

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Jason Green
1977 240D AUTOMATIC the Beast
1974 Super Beetle



Suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself.
- Mark Twain, a Biography

High risk of it breaking off in the head.

Here is one I have.
W 601 589 00 53 00

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I have both. Both get the job done, Diesel911's are very attractive because of the price, but I prefer my $125 Hazet OE MB one because one can use the ratchet and extention directly on the tool even at nearly 90 degree angles, but Ive done this work to 6 cars already, so thats fine, but I wanted to try Diesel911's and it got the job done for $25.00. Not bad.

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.

I used the largest drill bit that would fit without carving up anything it ain't supposed to (19/64s) by hand on the ones I could get it in. But as you work your way back there is less room and on #5 no room for a 4-5" long drill bit. I considered cutting a bit shorter but immediately realized that I would end up dropping it in, and was not going to run that risk! So I dug around in my junk metal pail found a rod that was over 1/4 " and under 5/16ths, cut it to about 5", cut some little flutes with the dremil, heated it, bent it in the middle so it was l shaped. It isn't pretty, but it worked perfectly, and because of the bent part I was able to rotate it and still not drop it in.
Someone else here on another thread took an old GPlug and just hammered the end flat so it was a bit wider/longer and threaded it in and out. If I had had a bad GPlug handy I would have done that.

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Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR

The reamer bit is fatter than the glow plug so it cuts a larger hole than the glow plug tip.

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84 300D, 82 Volvo 244Gl Diesel