The C-Class is currently the sales leader in Germany, approximatively since its market introduction. But the e90 is not far at all and could outsell the Merc with the FL.

The A4 did remarkably well even in its last months, don't know about the new one.

The new 220cdi could make miracles for the C-Class (the current has a too hign consumption).

In time of old A4, W203 and e46, you had e46 then A4 (not far at all) and then W203 (noticeably less than the two others).