Mayday-Mayday, super lead-free instead of diesel fueled!

Moin, I had a really stressful day today, which I have just put on the crown myself: instead of diesel I have just 50 L Super lead-free in my Phaton 3.0 V6 TDI with just under 13,000 km of mileage! I drove about 3 km after refueling, parked, brought a package to the post office and then the car started only in the third attempt. An error message was not shown to me, so I drove slowly. Only then I remembered that I was super lead-free instead of diesel After refuelling: 3,9 km . Tomorrow I have my Phaeton towed into the factory, pump the tank empty and clean the fuel system.Was someone in front of me ever so trotty and there are some experiences, whether this route after the wrong refuelling could have caused serious damage to the engine, fuel or exhaust system? I could bite myself in the very best, but I am because of the good bet rs has been driving almost only with my Smart Cabrio lately and I guess I’ve already gotten used to the super lead-free tank… Greetings from Hamburg Björn