In the CRM page's Quick Links section, there is a Unit Inventory link. Choosing this option will open a new tab to allow you to search Unit Inventory without losing your place in the CRM.
To search for a unit, type your search term at the top of the screen by the magnifying glass and click the Search button. The universal search will find all Makes, Models, Stock Numbers, Types, and VINs that contain your search term.
If you want to search specifically for something other than these fields, you would click the Advanced Button next to Search. This will open a window where you can enter specific information to search units.