I mentioned the inlet manifold and dpf filter that was a Previous fault last year just to rule them out , only recently replaced the dme relay and fuel filter , have plugged it to a obd 2 but no codes

Can anyone help , my x3 2.0d has problems starting up first time when left over night ,it starts then stalls ,but starts up straight after and then fine all day , if the weather is warm strangley enough the car starts straight away I've had the dpf filter replaced the inlet manifold replaced also ...