Yannis

Haven't seen the new C class but compared to the previous model A4's interior is better build and more solid, the materials and ergonomics are also top notch.

BMW E92 has well build interior also but i would give the A4 a slight edge in build quality and material quality.

Note here that i have a B6 A4 for 3 1/2 years and after 42,000 tough kilometers (Greek roads suck , pleanty of potholes and imperfections) you can't hear any rattle at all. The plastic parts are all in excellent shape.