I'm doing a rotor and front wheel bearing replacement in my 300sdl and came across these little copper insert tabs that connect in the center of the axle with a flap that appears to be in contact with the allen head locknut.

What is this copper tab for? Something to do with the ABS? How should I replace these, new ones come with my wheel bearing kit.

Thanks for any help or suggestions !!!

__________________
87 300SDL (115,000mi. 7/1/2008)
03 Jetta Wagon TDI (62,000mi. 7/1/2008)
75 240D(sold, sad to sell it, needed the garage for the SDL!)

Smokey

To remove static discharge, giving a quieter radio.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

I had also heard that it might be a brake pad wear sensor. What is it actually designed to contact?

Thanks !

__________________
87 300SDL (115,000mi. 7/1/2008)
03 Jetta Wagon TDI (62,000mi. 7/1/2008)
75 240D(sold, sad to sell it, needed the garage for the SDL!)

Smokey

It contacts the dust cap over the bearings.

I understand that it is the ground for the brake-pad wear sensor.

- Jeff Miller
190DT

You might go back to the person who told you that and give them a short message. "It ain't so."

Also not so.

Ding....Ding....Ding.....we have a correct answer.

__________________
1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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The Chassis Service Manual for the 123 series refers to that part as the "contact spring for radio inteference suppressor."

Not an issue when you have satellite radio.

__________________
-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)

Installing a satellite radio would cause my car to triple in value!!!

Wow this thread is like a game show!

__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair