MOST25® Amp Retention Interface - BMW | Mercedes-Benz 2001-2020

This vehicle-specific add-on amplifier interface is designed for use when replacing the factory radio with an aftermarket unit. It allows you to retain the factory Harmon Kardon® amplifier in select BMW and Mercedes-Benz vehicles, ensuring your upgraded radio integrates seamlessly with the existing audio system. The interface also preserves the factory balance control and features a Micro “B” USB port for easy updates.

Features:

• The Axxess amp retention interface must be used in conjunction with a compatible radio replacement interface to successfully integrate and retain the factory amplifier
• Add-on amp interface to use with select Axxess interfaces  
• Retains Harmon Kardon amp in BMW and Mercedes-Benz
• Retains balance  
• Micro “B” USB updatable
• 1-year limited warranty

Includes: 

• Interface
• Harness
• Fiber optic extension

Refer to our Vehicle Fit Guide for up-to-date vehicle-specific applications