BEVO petrol instead of diesel at the CDI

Hello Mercedes Diesel – driver, me or rather my wife something very stupid happened. She accidentally refueled our Mercedes E 220 CDI with 14 liters of petrol instead of diesel. Then she noticed the mistake and filled up with diesel. At the gas station she inquired if she was allowed to drive with it after all the friendly employees had no idea and could not say anything. She then drove a bit and stopped, a Mercedes workshop then she a This is of course a really nice hammer, one of you has an idea if I have a chance to repair the damage here. Maybe comprehensive, insurance of the gas station I have no idea, maybe one of them can give me tips. Thanks Heinz