So when will be the results in?

I understand something like beginning of September and about two weeks after L1 and L2?

21 August or 28 August I reckon. I received an email before the exam saying that results will be released in late August.

The results for L1 and L2 are normally in on the 8th tuesday after the exam. That would be the 14th of August this time. L3 are in 2 weeks after, so indeed the 28th.