The section is really demanding and slippery and therefore dangerous, especially after a rainy phase because of the many roots and the slope. If you drive southwest, a very inconspicuous path begins just before the S3 section on the right - Komoot shows this path as an alternative route to the Ortereralm. ABSOLUTELY AVOID THIS PATH! After a very short distance, there is a very steep slope crossing with very high grass on the side (no chance of stopping in the event of a fall (i.e. in case of a fall :-)) - neither for humans nor MTB. After this passage, there is a zigzag descent (also shown on the map) which is very difficult to master, especially with a heavy e-bike - the terrain is also very blocked and pushing the bike is out of the question - the section requires lifting, tugging and carrying the bike - I did this section downhill and especially on my own any injury would be problematic - despite the fact that you can already see the hut from the middle - do get lost here especially under the week nobody. So, avoid the inside path at all costs... and stay healthy. The S3 variant is by far the "lesser evil".