Again, YMMV based on where you live. In the interest of getting this thread back on topic, I'd like to leave you with this little tid-bit from ALG:
2012 AUDI A6
https://www.alg.com/images/SO11_IR_US/nl_large_2012auda6.jpgAs Mercedes and BMW have continued to consolidate their hold on the Luxury segment (sharing roughly 60% of sales), Audi looks to regain the glory of its 2nd generation A6, which made a big sales splash with its curvy aesthetic. The brand again sets the segment design standard, and takes elements from its upscale A7 and A8 brethren, such as available full-LED headlights, textured wood trim and Audi's touch-pad MMI interface. It even offers an in-car Wi-Fi hotspot. Audi has managed to make the car lighter with aluminum despite more size and features. Powertrains carry over, but a hybrid debuts later in the year.
ALG OUTLOOK - The new A6 should help Audi once again challenge the segment leaders.
September/October 2011 24 Month 36 Month 48 Month 60 Month Audi A6 64% 54% 45% 37% Audi Avg. 63% 53% 44% 37% Luxury Car Avg. 59% 49% 40% 33%
https://www.alg.com/pdf/SO11_IR_US.pdf
Pay close attention to the residual values as compared. 20% dip in a car's value at delivery does not bode well for any manufacturer. And as K-A as mentioned, why would an informed consumer even consider a C250/300/350 in the mid $ 40's range when you can buy an E for the same price.