The differential on my 1997 E420 (ASR) has a 13 mm (not 14 - don't know why) allen drain plug.
I cannot seem to find it anywhere. Where should I go?
Snapon and Sears are out.

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

I believe Auto Zone Has a 3 pack...

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Peter L. House
1998 Sport E430
Azure Blue
110,000k Miles

1987 Oldsmobile Cutlass Salon
V8 Bucket Seats
Factory Moon Roof

Should be 14 ... did you clean it out well ???

If it is a 13, you can try a 1/2 " allen...
13mm=.512"

Yes, it's 13 - very strange.

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

It is possible that the original was damaged when removed at one time and replaced with the 13 .. or, it may even have been replaced with a 1/2" allen and you think it is a 13..
Either way,....Try a 1/2" allen.... if it is 1/2" , it will fit perfect, or if it is a 13 , the fit should be tight enough to do the job...

My local Sears carries the 13mm allen head. They don't carry the 14mm carried in a set by Auto Zone as mentioned above.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

Are you sure Sears does?
I thought it was only 10mm or 17 mm.
I'd better talk to someone next time if you saw it.

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

The Sears in my area carries allen head sizes thru 13mm. They do not carry the 14mm or 17mm. Auto Zone carries those in a set.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

True Value Hardware had a surprisingly great selection of allen wrenches when I was looking for a 14mm. (my local Sears did not have any)

It may be worth a look.

Jeff Pierce

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Jeff Pierce

Current Vehicles:
'92 Mercedes 190E/2.3 (247K miles/my daily driver)
'93 Volvo 940 Turbo Wagon (263K miles/a family truckster with spunk)
'99 Kawasaki Concours
Gravely 8120
Previous Vehicles:
'85 Jeep CJ-7 w/ Fisher plow (226K miles)'93 Volvo 940 Turbo Wagon
'53 Willys-Overland Pickup
'85 Honda 750F Interceptor
'93 Nissan Quest
'89 Toyota Camry Wagon
'89 Dodge Raider
'81 Honda CB 750F Super Sport
'88 Toyota Celica
'95 Toyota Tacoma
'74 Honda CB 550F

AutoZone (Part # 25417)

__________________
1977 Mercedes 240D. 4-speed transmission. Windows, A/C, and sunroof: all manual. Medium Red. 204K miles.
1988 Subaru GL wagon. Dual range 5-speed 4X4. Daily driver w/ twin parts car.
1994 Subaru Loyale wagon. 5-speed 4x4
1966 International 3/4 ton 4X4 truck. Ooh yeah!
1952 Ferguson TO-35 farm tractor.
1984 Snapper rear engine riding mower. Just like Forest Gump.
1988 Nimble 20 sail boat
--Older stuff is built better--