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Small black rectangular box with wiring harness and connectors

METRA

METRA AXDI-MB1 Radio Data Interface car amplifier

SKU CH-Z0Q5-QZQHQ

Radio data interface for select Mercedes vehicles from 2001 onward, providing 12-volt 10-amp accessory power, retained accessory power, navigation outputs.

  • TypeAmplifiers
  • Provides 12-volt 10-amp accessory power for aftermarket installs
  • Retains factory R.A.P. so accessories stay on after key-off
  • Supplies NAV outputs including parking brake, reverse and V.S.S.
  • Pre-wired AXSWC harness ready for steering-wheel control adapter
  • Micro-B USB port allows firmware updates when needed

Mercedes Radio Interface 2001-Up

The Axxess AXDI-MB1 radio data interface integrates an aftermarket head unit with select Mercedes-Benz vehicles from 2001 onward. It supplies a 12-volt 10-amp accessory power feed and retains the factory retained accessory power function. The module is designed for non-amplified audio systems or installations that bypass the original amplifier. It also preserves the vehicle's balance and fade controls.

Pre-Wired Harness and NAV Outputs

A pre-wired AXSWC harness is included for steering-wheel control integration, though the AXSWC adapter itself is sold separately. The interface provides navigation-ready outputs for parking brake, reverse gear and vehicle speed sense signals. These connections allow a compatible aftermarket navigation unit to function correctly. Firmware updates are applied through a micro-B USB port on the module.

Non-Amplified System Constraint

This interface only supports vehicles with non-amplified factory audio or installations where the factory amplifier is bypassed. It cannot drive amplified systems directly without additional integration steps. Buyers with factory-amplified Mercedes models who do not intend to bypass the amplifier cannot use this module. The 10-amp accessory power limit also restricts the current available to the aftermarket radio and accessories.

Highlights

  • Provides 12-volt 10-amp accessory power for aftermarket installs
  • Retains factory R.A.P. so accessories stay on after key-off
  • Supplies NAV outputs including parking brake, reverse and V.S.S.
  • Pre-wired AXSWC harness ready for steering-wheel control adapter
  • Micro-B USB port allows firmware updates when needed

Specifications

TypeAmplifiers

Questions about this item

Will the 12-volt 10-amp accessory power circuit need a fuse replacement over time?

The interface supplies a 12-volt 10-amp accessory feed; the circuit is protected by the vehicle's own fuse panel, so only a blown vehicle fuse would need replacement.

What limits continuous operation when the unit powers navigation outputs all day?

The 10-amp accessory rating is the first limit; sustained draw above 10 amps on the 12-volt output will trip the vehicle fuse.

Does the interface generate noticeable heat or fan noise during extended use?

The module has no fan and draws only the current needed for retained accessory power and NAV outputs, so heat and noise remain minimal.

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