I cannot say I have the issue with the 211 but any smaller seats I do.
The C63s seats are not IMHO that good. The lower squab does not tilt up enough to support your legs, the back rest is too narrow and it does pinch a bit. The wheel on a C63 does not reach out enough.
They look nice.
The seats and driving position in a boggo E500 coupe are vastly superior IMHO,
The 212 is also a seating delight, the chairs are butt ugly but the driving position is just better.