Once started on the second try, it idles at around 900-1000 rpm for a few seconds, then quickly drops to its normal 750 idle. Shouldn't it have a higher idle for longer periods of time when it's cold? My other cars ('05 C230, '00 Audi A8) are idling at 1200-1300 rpm when cold, and they don't drop their idle as fast as the 190E does.