What all these fault codes together might mean?

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I have a Saab 95 2.2 TiD 120 HP 2004. For the last 3 years it needs 3-4 cranks only for a cold start + 5 secs of white smoke. Rest of the day drives fine. No hesitations,missfires etc. A month ago: code P0336 appeared: erased. Today sudden engine stop al low speed and the folllowing codes: P0103 (Maf sensor high input) + P1103 (GM: MAF sensor in range but higher than expected) + P0335 + P0336 + P0337 (Crankshaft position sensor issues) + P0340 (Camshaft position sensor malfunction).....and the car drives perfectly. Looks very complicated. Any hints? Thanks