Hi, i have a audi a6 c7 with a incorrect steering rack currently fitted, i originally bought a steering rack myself going off module number (didnt work). i have also been to a very reputable VAG specialist breaker in the UK for a replacement supply & fit however they have been unable to fix this issue. it keeps coming up with incorrect version of control module installed. I have now ordered another one from a different breaker, my question is, my original part number apparently (i say apparently because i was not supplied a steering rack with this car), is 4G2 423 055 BQ/AT/DR & the control module number is 4G0 909 144 L. Do i have to match up both these numbers or just go off my actual rack number? the breaker i have bought the rack from (yet to receive) is adamant that only the rack part number is necessary. Also what is the procedure for fitting and is anyone with ODIS or workshop able to code it in for me? thank you.

On a separate note i have the ESC, Air suspension, diff all displaying a u11130 Code, is this all connected?

Thank you.