Schnellfahrstrecke Kassel - Würzburg Collectable Guide
There are 6 collectables near Hartberg (5 tunnel signs, and 1 gravel pile)
Collectable #1: Tunnel Sign
Collectable #2: Gravel Pile
Collectable #3: Tunnel Sign
Collectable #4: Tunnel Sign
Collectable #5: Tunnel Sign
Collectable #6: Tunnel Sign