Where is the air nozzle to manually fill rear suspension on a 2000 Lincoln navigator?

The 2000 Lincoln Navigator's rear air suspension doesn't have a readily accessible air nozzle for manual inflation like some other vehicles. Instead, the system is controlled electronically and automatically maintains pressure. If the suspension is low, there's a problem that needs professional diagnosis and repair, likely involving a compressor, air spring, or control system component. You won't find a simple valve to add air yourself.