You want to set Access Authorization for Vehicles in C4C.
Reproducing the Issue
Go to Products work center.
Go to Vehicle Management view.
Here you need to set access authorization of the Vehicles among different organization.
Currently Access restrictions are not supported for Vehicle.
If you need this functionality urgently you may contact your implementation manager to help with such request or approach directly at SAP Cloud Service Center (firstname.lastname@example.org).
Note: The services of SAP Cloud Service Center will be charged as packaged services based on fixed prices.
An alternative option will be to check SAP Cloud for Customers Idea's Forum and submit your idea:
Products , KBA , product , vehicle , LOD-CRM-IND-AUT , Automotive Industry , Problem