MOST Audio Gateway

Function

Vehicles after 01/09/2003 have MOST-connected Audio Gateway (AGW) installed in the trunk. AGW acts as a radio tuner, MOST master and sound amplifier (unless vehicle has option code 810 Sound Amplifier).

Location

Part Numbers

For vehicles except option code 529 (Japan) and 530 (USA):

Part No.	Notes
A2208271142	To date 20/01/2004
A2208701789	From date 20/01/2004 (replaced by A2208702889)
A2208702889	From date 20/01/2004

For vehicles with option code 530 (USA), 625 (Australia) and K08 (radio frequencies for South Africa):

Part No.	Notes
A2208271242	From date 28/10/2003 to 20/01/2004 (replaced by A2208701889),
A2208701889	From date 28/10/2003 (replaced by A2208702989)
A2208702989	From date 28/10/2003

Wiring diagram

MOST + MQS 4-pin connector

MOST 2-pin plug (A0025459040) and MQS 4-pin plug (A0025458440) is used inside MOST and MQS 4-pin housing (A0005458430).

MOST housing:

1 (Receive) - MOST in
2 (Transmit) - MOST out

MQS 4-pin housing:

1 (yellow/black) - Mute (Telephone mute connector sleeve)
2 (brown/red) - CAN-B H (Left voltage distributor (CAN) connector)
3 (blue/black) - MOST wakeup
4 (brown) - CAN-B L (Left voltage distributor (CAN) connector)

Audio output connector

Only for vehicles without sound system (option code 810). For vehicles with sound system Audio Gateway does not act as amplifier, but sends audio to Sound Amplifier over MOST network.

1 (blue) - (+) Bass module speaker speaker connector (pin 2)
2 (blue/white) - (-) Bass module speaker connector (pin 1)
3 (blue/yellow) - (+) Center cockpit speaker connector (pin 2) through Cockpit wiring harness and FFS [RBA] connector (pin 4)
4 (brown) - (-) Center cockpit speaker connector (pin 1) through Cockpit wiring harness and FFS [RBA] connector (pin 3)
5 (grey/green) - (+) Center cockpit speaker connector (pin 2)
6 (grey/white) - (-) Center cockpit speaker connector (pin 1)
7 (green) - (+) Left front door speaker group connector (pin 2)
8 (brown/green) - (-) Left front door speaker group connector (pin 1)
9 (pink) - (+) Left rear door speaker group connector (pin 2)
10 (brown/pink) - (-) Left rear door speaker group connector (pin 1)
11 (white) - (+) Right rear door speaker group connector (pin 2)
12 (brown/white) - (-) Right rear door speaker group connector (pin 1)
13 (black) - (+) Right front door speaker group connector (pin 2)
14 (brown/black) - (-) Right front door speaker group connector (pin 1)

Power connector

1 (blue) - Rear window antenna amplifier module connector (pin 2)
2 - unused
3 (brown) - Ground (left wheelhouse in luggage compartment)
4 (red/yellow) - Fuse 24 left fuse box

Antennas

(black) - Rear window antenna amplifier module (pin B)
(black) - Rear window antenna amplifier module (pin C)

Firmware Update

Firmware can be updated using SDS under "Audio gateway (MOST network management diagnosis gateway radio tuner) AGW -> Control unit adaptations -> Control module programming". However, since the update process goes online to pull latest firmware version the procedure can be done only by the dealer using their Star Diagnosis machine.

The latest software version available for AGW A2208701789 (checked April 2015) is 16/2005.