C'mon, Herman, Mercedes capacity for coolant can be up to a quart more than BMW and the extra weight adversely effects acceleration, braking and handling. Therefore, the BMW must perform much better. If you likes the cars, you must likes the BMW better. Porsches used to not have any water coolant at all and they were even better, which is proof that water as coolant is no good at all.
With tongue firmly in cheek-
Jim
With tongue firmly in cheek-
Jim