It has been a few years since I bought mine, but it came in a set of three sizes (10, 12 and 14 mm) sockets (with hex bit) from Autozone.

Ken300D

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1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles

"oh look at me i have money, i can buy tools" I made mine with a 14mm bolt and two nuts with some red loctite.

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I like cars.

Thats the the info i was looking for. I don't have money and buying one from SnapOn sounds way to expensive.

yea, very expensive. i have a snapon order book and i drool over everything

have you tried sears? or your local tractor supply co?

snap on sucks, too expensive and the sales guys are snobs. i buy matco tools. now those are worth droolin over. id take matco over every other brand

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have no worries.....President Obama swears "If you like your gun, you can keep it

Ordered a nice one from the local NAPA store and it was about 5 bucks and tough enough to use a cheater pipe on.

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Habits I support
95 E300 D 220,000 & counting (I think I'll call him Fritz)
02 Tahoe (Momma's ride)
98 GMC Sierra 120,000
57 Chevy Nomad (bought in '69)

I did better than that. Go to the hardware store and get a 3/8" coupling nut. It is a 1 1/2" or so long nut for putting two pieces of threaded rod together. The wrench it takes is 9/16" which is 14.3mm. Put one end in the hex socket bolt and a 9/16" or m14 wrench or socket on the other end and presto. Used it for my differential drain and fill plugs. Cost less than a buck, and you don't have alignment issues like you can have with the setup above.

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Doug

1987 300TD x 3
2005 E320CDI

Nice idea!

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Autozone used to carry a set of 1/2" drive hex bits. 12, 14 and 17 mm. All for the princely sum of $8.50. The ones I bought from them were called "OEM" brand, and while not Snap-On quality, are surprisingly nice. This was a coupla' years ago. FWIW

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Where did you get your coupling nut? The ones at my local hardware store were either too big or too small.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Here it is. $9.99

http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performMoreDetail&Parameters=TRUE%7C%7EHand+Tools%7C%7ENONE%7C%7E1%2F2%22+Drive+Metric+Hex+Bit+Set%7C%7ENONE%7C%7EFALS E%7C%7EFALSE%7C%7E141505%7C%7E1323%7C%7E25417%7C%7ENONE%7C%7E%249.99%7C%7ENONE%7C%7ENONE%7C%7ENONE%7 C%7ELLT%7C%7E0.8%7C%7EEA%7C%7EB%7C%7EGRN%7C%7Etrue

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Bob
'82 300D Petrol B-G Metallic

Bob, Nice find. That's the set I got a while back and, honestly, they don't look bad at all when you look at them closely. Worked well for me. Thanks for bothering to find them.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Ditto

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

I bought a 14mm allen wrench then had part of it cut off so I could put it into a socket. I did all this for the same reason you are. I need to drain the differential fluid. Seems like all the 14mm hex bit sockets are pretty expensive, but the allen wrench I got was cheaper. I did get it off the internet though.

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Autozone - the three set bundle was less than $15. But was hidden in their tools section.

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JWJ
1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG
1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG
Biodiesel, Mobil Delvac 1, and Viton fuel lines!