I am in need of a new front exhaust pipe, part number 1704902119, that I can only find at the dealer. I see aftermarket pipes on eBay for the pre-facelift models for only a fraction of the cost. Does anyone know if there is a reason the 96-99 front pipes cannot be used on a post face-lift car? Benz does give a different part number for the earlier models, 1704900419, but the illustrations provide no differentiation. Thanks.