Looking at my 2005 Crossfire brochure I see the following:

Standard on Limited and not available on Base:

• Satin Chrome Door Handles
• Universal Garage Door Opener
• Three Piece Custom Luggage Set
• Fog Lamps
• Leather Trimmed Seats
• Heated 8-way Power Driver's and 4-way Power Passenger Seats
• Infinity Modulus 240-watt Sound System with Dual Subwoofers
• Tire Pressure Monitoring System

Optional on Limited and not available on Base:

• 5-speed Automatic Transmission with AutoStick
• GPS Navigation

As far as I know the Base model also has body colored side strakes and windshield surround where both are silver on the Limited.