For the last couple of months my 2005 c230k has had a strange cold start sometimes. When the car sits for more than 8-12 Hours when starting the car for the first time it will stall almost immediately, Also the car starts up perfect the second time which has me confused. The car starts up perfect otherwise just when it sits for 8+ Hours. No CEL Light and also checked for any stored DTC'S and there were none. Any help would be much appreciated!!