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2004.5 front brake part #'s please (pads & rotors)?

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Old Feb 20, 2009 | 10:06 PM
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'16 E350, gone: '03 c230k
2004.5 front brake part #'s please (pads & rotors)?
I'll need to do brakes this springtime on my '03 c230k ss. I've got a set of the 2004.5 front brakes I'd like to put on, but am at a loss on part #'s for the pads & rotors to use. Can somebody help please?

I'm looking for stock part #'s for the 2004.5 pads and rotors. I'd also be interested in performance/aftermarket upgrade part #'s too.

BTW, I read thru the brake upgrade thread in the mod's sticky - a lot of good info there, but I didn't see these part #'s. Also searched for quite a while to no avail. I also went to the various websites and only get stuff like 'front rotor for 2003-2006 c230k', which I know can't be right.

Thanks in advance!!!
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Old Feb 20, 2009 | 10:30 PM
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Just thinking some more ... Could it be as simpe as just ordering the C32 pads & rotors? But I thought the C32 had slightly larger brakes/pads/rotors than the 2004.5 ... ???
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Old Feb 20, 2009 | 11:23 PM
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Originally Posted by mtnman82
Just thinking some more ... Could it be as simpe as just ordering the C32 pads & rotors? But I thought the C32 had slightly larger brakes/pads/rotors than the 2004.5 ... ???
Do the calipers have 2 or 4 pistons each?
If 4 then I believe you can just order C32 stuff.
But hopefully others will chime in to be sure.
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Old Feb 21, 2009 | 01:09 AM
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4 pistons (2 on each side). They have the 4 socket head bolts on each side (vs. the 2 star head bolts on the 05+).
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Old Feb 21, 2009 | 01:00 PM
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a quarter mile at a time
No. The 2004.5 4-piston brakes are different than the C32/C55/C350 4-piston brake calipers.

Start reading here: https://mbworld.org/forums/c-class-w...ml#post2744171
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Old Feb 21, 2009 | 01:39 PM
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e, you are a gentleman and a scholar. Thanks!! For posterity's sake, copied from the link above:

2004.5 brakes:
calipers
A003 420 22 83 left
A003 420 21 83 rigth
rotors
A203 421 13 12 (12,8")
pads
A004 420 05 20

2005 brakes:
calipers
A003 420 36 83
A003 420 39 83
rotors
A203 421 13 12 (12,8")
pads
A004 420 51 20

C32AMG brakes:
calipers
A002 420 19 83
A002 420 20 83
rotors
A203 421 09 12 (13,6")
pads
A004 420 05 20

Note that the pads are the same for the C32 and 2004.5 calipers, but the bigger C32 rotors will not work with the 2004.5 brakes (later in the thread linked above).
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Old Feb 21, 2009 | 02:53 PM
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Originally Posted by mtnman82
e, you are a gentleman and a scholar. Thanks!! For posterity's sake, copied from the link above:

2004.5 brakes:
calipers
A003 420 22 83 left
A003 420 21 83 rigth
rotors
A203 421 13 12 (12,8")
pads
A004 420 05 20

2005 brakes:
calipers
A003 420 36 83
A003 420 39 83
rotors
A203 421 13 12 (12,8")
pads
A004 420 51 20

C32AMG brakes:
calipers
A002 420 19 83
A002 420 20 83
rotors
A203 421 09 12 (13,6")
pads
A004 420 05 20

Note that the pads are the same for the C32 and 2004.5 calipers, but the bigger C32 rotors will not work with the 2004.5 brakes (later in the thread linked above).
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Old Feb 21, 2009 | 02:59 PM
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Interesting...I wonder if 16" wheels would fit on the 2004.5 brakes?
Well, now that you know that the AMG size pads will work,
I highly recommend the Akebono pads.
You can source them from tirerack.
They last forever!!! Compared to the MB pads which last like 20-30K.

Originally Posted by mtnman82
e, you are a gentleman and a scholar. Thanks!! For posterity's sake, copied from the link above:

2004.5 brakes:
calipers
A003 420 22 83 left
A003 420 21 83 rigth
rotors
A203 421 13 12 (12,8")
pads
A004 420 05 20

2005 brakes:
calipers
A003 420 36 83
A003 420 39 83
rotors
A203 421 13 12 (12,8")
pads
A004 420 51 20

C32AMG brakes:
calipers
A002 420 19 83
A002 420 20 83
rotors
A203 421 09 12 (13,6")
pads
A004 420 05 20

Note that the pads are the same for the C32 and 2004.5 calipers, but the bigger C32 rotors will not work with the 2004.5 brakes (later in the thread linked above).
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