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Could anyone provide the correct part number for the CD changer in the boot of my 2003 RS6 C5? I'm wondering if I could replace it with a standard A6 unit from the same year? "Who uses CD's these days" I hear you all say and I agree but I'm trying to keep my car as factory standard as possible so this is important to me.

I think the part number is 4b0 057 111A.

I am pretty sure that any changer that works with a RNS-D or E will work.

Thank you Shoppinit. Much obliged.

Found this one from an S6 C5. Not quite the same part number but close. Any thoughts as to whether this might be a match?

https://www.ebay.co.uk/itm/204156865230 ... R-7Wo4-eZg

Yeah, that's odd. I can't find that reference in the parts catalogue for either the RS6 or the S6. This site seems to imply that they are equivalent parts:

https://wolfautoparts.com/6-disc-cd-cha ... s3822.html

This one, too:

https://www.1factoryradio.com/products/ ... 4e0035111a

I wonder if the part supplied with the car is the 035 and the aftermarket part number is the 057. Dunno.

/Anyway, it's sold so either it's too late or you bought it and can tell us if it works.

In ETKA the info for the exchange part (4B0 057 111AX - X for exchange) says that either 4B0 035 111A or 4B0 057 111A is acceptable in exchange. That's as close as finding solid info that they are equivalent as I can get.

S3ADF wrote: ↑

Fri Aug 29, 2025 1:49 pm

Found this one from an S6 C5. Not quite the same part number but close. Any thoughts as to whether this might be a match?

https://www.ebay.co.uk/itm/204156865230

Showing as sold - did you buy it? If not, one of my Audi buddies has four C5 A6 allroads in his yard, he probably has one!

Thanks for all the feedback. Yes, I did buy it. Worth a punt for £50 delivered to the door I think (hope!). I won't be getting it fitted for a little while (need technical assistance!) but will let you know the outcome in due course. Once again this goes to prove the value of this forum to us diehard owners

S3ADF wrote: ↑

Fri Aug 29, 2025 5:42 pm

Thanks for all the feedback. Yes, I did buy it. Worth a punt for £50 delivered to the door I think (hope!). I won't be getting it fitted for a little while (need technical assistance!) but will let you know the outcome in due course. Once again this goes to prove the value of this forum to us diehard owners

S3ADF wrote:Could anyone provide the correct part number for the CD changer in the boot of my 2003 RS6 C5? I'm wondering if I could replace it with a standard A6 unit from the same year? "Who uses CD's these days" I hear you all say and I agree but I'm trying to keep my car as factory standard as possible so this is important to me.

I’ve got one that’s in perfect working order out of mine


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