If you download a .rar or .zip file (not from Steam), follow these exact steps. A mistake here will cause the bus to appear invisible or produce errors.
This is the most comprehensive free option, featuring 39 different versions. It includes various configurations like the A21 (12m City) A23 (18m Articulated) . You can download it at the OMSI WebDisk MAN Citybus Series (Payware): omsi 2 man nl ng 263 download
The original MAN NL/NG 263 is often available as a freeware modification from various OMSI fan sites. Always download from trusted sources to avoid broken files or malware. If you download a