Monaco is a super track, fantastic fun to race on the edge of virtual wall death.
Sorted out my F2004 issue as it was the Ferrari steering lock. Anyhow got a very nice custom F1 car from here with a lock that works on Monaco.
https://www.**************/mods/assetto-corsa/ferrari-f2004-2004-2/
Every car, when you have this problem, you may try this (Content Manager- dev mode- required)
*make a backup first of the car you want to manage...
1 - With Conten Manager running, open the car at "content tab"
2 - click in "Unpack data" at bottom
3 - open assettocorsa\content\cars\*car_folder*\data\car.ini
4 - change STEER_LOCK to 270 (STEER_LOCK=270)
5 - save car.ini and click in "Pack data"at Content Manager
(bonus)
You may experience some problems with the driver animation handling the wheel... (if not, disconsider)
1 - open assettocorsa\content\cars\*car_folder*\data\driver3d.ini
2 - try these settings...
[STEER_ANIMATION]
NAME=steer.ksanim
LOCK=220 (try a higher number from 180)
3 - save driver3d.ini and click in "Pack data"at Content Manager
I hope you can get it right this time... have fun!