Really? The w126 master key I got last year has an oval hollow in the plastic head. It's holding up well; never been on a key chain, ring, hook, etc.

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daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/346302-w123-billet-key-heads-sale.html

The solution

replacement mercedes key heads would be the perfect item to 3d print! all that's needed now is for someone to make the CAD file. i don't has teh skillz.

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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped

At least for the 123 models, usually Axxess key blank 41 fits as master key. I have two. Also Mazda keys fit too.

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

My brother got 2 keys for his W123 and both of them fell apart quickly. Seems to be an issue with W123 keys as the W126 ones hold up fine and have a thicker material. The keys are different for a W126/W124/W201 though. W123 have a more old-school key.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

the 123 and 126 keys might very well be the same, it's the useless plastic sleeve M-B is putting on the former that has to be avoided.

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'77 240D, 504H, OM617.952, etc.

I have my original W123 in a vault, and I had a locksmith make up a bunch of solid metal copies

In my area only one locksmith has the proper cutter for our keys, and they charge $30 per key even if I supply the blank!

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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped

The keys are not at all the same between W123 and W126.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

My Gwagen key that I bought broke after about 3 months as well (Again cheap plastic head)

I've been meaning to send it out to WA to get the wooden head.

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1982 300GD Carmine Red (DB3535) Cabriolet Parting Out
1990 300SEL Smoke Silver (Parting out)
1991 350SDL Blackberry Metallic (481)

"The thing is Bob, its not that I'm lazy...its that I just don't care."