TahoeAudi

I have recently started driving my wife's 2011 A6 after having driving a BMW 535xi Sport Wagon for 8 years previously. (She just got a 2016 allroad.) I find the steering of the A6 is driving me crazy due to its very light touch, even at highway speeds. The A6 was our 12th Audi over the last 35 years and very predictable and stable steering was always one of the strong points before. (Wife's new allroad has great steering just like our earlier models.) The A6 does not have Audi Drive Select, so I would like to know if there is any VAGCOM coding tweak that I can do to stiffen up the steering. I see lots of web info regarding tweaking A4's, but none for A6's. Any help would be appreciated.
Thanks.