in addition, the E420 has better-performing headlamps, being similar to Euro-spec lamps. If I were to buy a 400E, I would factor in the cost of Euro-headlamps, for decent nighttime illumination. While you are at it, you can instead get the Euro 500E headlamps, which have driving lamps instead of foglamps. You will then have to mount foglamps in the airdam, if you really need them.

also be aware that airbags have a shelf life, so the newer models have more service life in them.