Help: brake size question

[campbell]

hello

I have a 2010 Audi A5 3.0tdi Quattro special edition, Im changing my brake discs as they are worn, is there any sure way of getting the right size for the discs as there are a couple of variants?
I have measured them with the wheel off and they measure about 320mm but they is rust on the them and the next size down is 314mm, I just want to be 100 per cent sure I order the correct size!
Audi won’t tell me!

Any advise is greatly appreciated !
Thank you

 

[desertstorm]

They are definitely 320mm discs.
http://www.ebay.co.uk/itm/Audi-A4-B...-Painted-Front-Brake-Discs-Pair/301976271621?

 

[campbell]

Sweet mate, thanks for the reply!
Much appreciated

 

[campbell]

They are definitely 320mm discs.
http://www.ebay.co.uk/itm/Audi-A4-B...-Painted-Front-Brake-Discs-Pair/301976271621?

Just noticed the link says A4 and mine is A5!? Do they use the same discs A4 3.0 and A5 3.0 tdi??
Sorry to be a pain !

 

[desertstorm]

Same brakes. Check the PR codes on your build sticker . will probably be 1LA for the brakes.
Sticker is in front of the service book and in the boot.
http://wiki.ross-tech.com/wiki/inde...Codes)_can_be_found_on_the_Vehicle_Data_Label

 

[campbell]

Top man! Thank you