Scenic 2 Cold start petrol odour low performance

Hello, I’ve had the following problem with my Scenic 2,Bj.2/2004.1.6/16v 113hp.80000km for a few days.Have had a long time (about 1year with the previous owner).Drive the car since 05/2018.Motor K4M 782: -after cold start in the morning(Kfz stood overnight) it smells after a few meters drive for petrol (no ventilation) and car takes on bad gas (accelerated weakly) as if some hp is missing. After approx.500m drive performance ok and no petrol odor further. 4 spark plugs and 4 ignition coils have already been exchanged.L auftfilter, oil change recently. Uses hardly any oil. Petrol consumption not remarkably high. No error message in the display. Could the injection nozzles be (undicht)? Where can I look for the error? Thanks for notes