AMS is based in STUTTGART. They also have a weak spot for Porsches.
In all seriousness though, I've seen AMS reviews where BMW won by a wide margin over Mercedes etc. Interestingly enough, I read a UK roadtest of the C230 (2.5 V6) and they loved it! They said it was a sporty car, a lot of fun and still quite comfortable. I don't doubt the BMW 3-series is still the sports sedan, but I suppose the revised C-Class will satisfy most sporty drivers while still giving that valued comfort that Benz buyers so want. Either way, you can't really go wrong with either of the three cars tested here.