Looks like the litany of issues I get when I drive my car too many days without charging the battery. Not saying that is what it is in your case though but that is where I would start - Battery/regulator/alternator.
My SZL caused the start-off assistance and dsc warning, but the increased emissions is from left field. That seems to indicate it may be battery. The dealer will answer quickly, pulling real codes trumps internet diagnosis every time!!!