In the first 35-mph crash test by NHTSA of a production-available air bag-equipped 1984 model car, a Mercedes-Benz 300SD failed to protect the driver-side dummy from serious or fatal chest injuries. Maybe.
The existing “acceptable limit” for chest deceleration is 60 g. Mercedes’ optional ($880) driver-side air bag, in combination with the 3-point belt, scored 63 g. The passenger dummy, restrained by seatbelt alone, showed a very acceptable 44 g.
A lot of air-bag opponents are crying “I told you so,” but there is of course more to the matter. A Mercedes spokesman questioned the validity and interpretation of NHTSA’s numbers, pointing out the existing tests and standards evolved in a seatbelt-only environment. The tighter restraining of a be t/bag combination stops the dummy quicker, he said, producing the higher…