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Discussion Starter · #1 ·
Which vagcom cable do I need for my A5. It has the basic concert system and no satnav so I guess it has the Can bus rather than MOST.
I did buy a cable for my 2003 A4 1.8 Cab, would that still work for the A5.
a
Also which version of the Ross Tech software would I need
Thanks in advance
 

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Everything you need to know is on the Ross-tech website.

I believe you can only use the HEX-CAN cables, whether it be Serial or USB.

See the application chart at this link: http://www.ross-tech.com/vag-com/cars/applications/a5s5.html
Yes, HEX-CAN is the one you need - it covers both old-style K line diagnostics and newer CAN diagnostics. A4 B8/A5/A6/A8/Q7 etc. need both. Last generation A4 needed only K line (so chances are your old VAG COM cable is not up to date for A5) and e.g. A3 needs only CAN diagnostics (hence the MicroCAN option on Ross-Tech site which only works on A3 and some other VAG cars, but not on other Audis if I recall correctly).

MOST or not MOST doesn't really change anything, at least in MMI 2nd gen MOST components still use K line for diagnostics and MOST only for other data/media transport. Some components in an A5 use K line, some CAN.

But for A5 you need HEX-CAN and it works on the most cars anyway (because it covers both diagnostics technologies), so it is the most versatile and future-proof purchase too.

I updated these notes to my VAG COM article too:

Interesting VAG-COM codes for Audi A5
http://www.geocities.com/a6retrofit/articles/a5vagcodes.html
 

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Discussion Starter · #4 ·
Thanks for the info
 
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