Our friend Henri discovered this BMW M3 Convertible German TV spot that takes a direct hit on the Mercedes-Benz SL by making it look like a boring roadster that’s good enough only for romance. It’s not the first time that BMW attempts to show the qualities of its cars by comparing them with the opposition. As you might remember, a couple of weeks ago we showed you the BMW X3 TV ad that ridicules American SUVs –click here. Check out the BMW M3 TV advert right after the jump. -Continued