MOST25® Amp Retention Interface - BMW | Mercedes-Benz 2001-2020 — AXEU-MOST25
Key features
- For select BMW / Mercedes-Benz 2001-2020
- 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
- Includes: Interface; Harness; Fiber optic extension
- Micro “B” USB updatable
MOST25® Amp Retention Interface - BMW | Mercedes-Benz 2001-2020 — AXEU-MOST25 is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Keep the factory Harmon Kardon® amplifier in select BMW and Mercedes-Benz vehicles when replacing the factory radio. The Axxess MOST25® Amp Retention Interface, model AXEU-MOST25, retains factory balance control and supports updates through its Micro “B” USB port.
Key Features & Benefits
- Factory amplifier retention: Keeps the factory Harmon Kardon amplifier in the audio system for select vehicles.
- Balance control retention: Preserves the factory balance control after the radio replacement.
- Micro “B” USB port: Provides a port for interface updates.
- Vehicle-specific application: Designed for select BMW and Mercedes-Benz vehicles from 2001–2020.
- Included components: Comes with an interface harness and fiber optic extension.
Technical Specifications
| Brand | Axxess |
|---|---|
| Model | AXEU-MOST25 |
| Product type | MOST25® amp retention interface |
| Vehicle application | Select BMW and Mercedes-Benz vehicles, 2001–2020 |
| Retained features | Factory Harmon Kardon® amplifier and balance control |
| Update port | Micro “B” USB |
| Required pairing | Compatible radio replacement interface |
| Included | Interface harness; fiber optic extension |
| Warranty | 1-year limited warranty |
Why Choose This Product?
Replacing a factory radio can require an additional interface to retain the original amplifier. The AXEU-MOST25 is designed for that role in select BMW and Mercedes-Benz applications, while also preserving factory balance control.
Its update port and included fiber optic extension address specific integration needs. The interface is an add-on component, not a standalone radio replacement interface.
Installation & Compatibility Notes
Use the AXEU-MOST25 with a compatible Axxess radio replacement interface to integrate and retain the factory amplifier. Confirm that your vehicle is among the select BMW or Mercedes-Benz applications covered for the 2001–2020 model-year range, and check interface compatibility before purchase.
Frequently Asked Questions
Does the AXEU-MOST25 replace the factory radio?
No. It is an add-on amplifier interface used alongside a compatible radio replacement interface.
Which factory audio component does it retain?
It is designed to retain the factory Harmon Kardon amplifier in select BMW and Mercedes-Benz vehicles.
Does it preserve factory balance control?
Yes. Retaining factory balance control is one of its stated features.
What comes in the package?
The package includes an interface harness and a fiber optic extension.
Explore More
Want to learn more about Metra Axxess? Explore our Metra Axxess brand profile and shop at 12 Volt Outlet.








