Mercedes-Benz A220 2020 Technical Service Bulletin # LI82-85_P-0479912 Date: 120612

Audio/COMAND(R) - Volume In AUX Menu Is Erratic

Audio AUX: Volume of AUX Audio Source Is Too Quiet

Topic number L182.85-P-047991

Version 2

Design Group 82.85 Navigation and communication systems (CNS, ICS, COMAND, FleetBoard)

Date 06-12-2012

Validity Model 204.0, 204.2, 207, 212 with code 523, 510, 525, 511, 527 or 512 and 808, 809, 800 or 801 (NTG4)

Model 204.9 with code 523, 510, 525, 511 527 or 512 and 808, 809, 800, 801 or 802 (NTG4)

Model 169,245, 171,230,211,219, 164,251 and 203.7 with code 525, 511 527 or 512 and 809, 800 or 801 (NTG2.5)

Model 463 with code EU1 (NTG2.5)

Reason for change Validity adapted

Complaint:

Different volume levels between AUX IN and radio or CD/DVD playback. During audio playback from an external MP3 player via the AUX jack,

the volume in the vehicle is too quiet. When switching from the AUX source to radio or CD/DVD the volume is too loud and must be turned down

by the customer. Traffic announcements are also too loud when an AUX audio source is active.

Cause:

The volume level of the MP3 player is too low.

Mercedes-Benz A220 2020 Page 44

Remedy:

Update the software in the head unit with DAS / Xentry Diagnostics.

Note:

As of the software releases listed below, the customer can choose between "Standard" and "Boost Mode" in the "Volume" menu in the AUX

application. In vehicles with SA code 518 [Media interface (N125/1)], software 08.47 is required in the media interface control unit (N125/1) for

this new function. This software update is launched automatically after the head unit software update.

Model 204

In vehicles as of model year 2010 (SA code: 800; series production breakpoint 06/2009) an adjustment option for the AUX source is implemented in

all head unit versions.

^ Audio 20 as of software 09.12

^ COMAND APS as of software 09.09

This software is available for vehicles up to and including model year 2009 (SA code 809) as of telematics CD version 09/2009 (A204 827 71 59

USA).

Note:

The "Boost Mode" feature is not available in Audio 20 units with hardware object numbers A 204 870 00 89 and A 204 870 02 89.

Model 212, 207

In vehicles as of model year 2011 (SA code: 801; series production breakpoint 06/2010) an adjustment option for the AUX source is implemented in

the COMAND APS.

This function is not available in the Audio 20.

^ COMAND APS as of software 10.20

This software is available for vehicles up to and including model year 2010 (SA code 800) as of telematics CD version 07/2010 (A 212 827 55 59).

Model 245, 171, 230, 211, 219, 164, 251, 463, 203.7

In vehicles as of model year 2010 (SA code: 800; series production breakpoint 06/2009) an adjustment option for the AUX source is implemented in

the COMAND APS. This function is not available in the Audio 20.

^ COMAND APS as of software 09.02

This software is available for vehicles up to and including model year 2009 (SA code 809) as of telematics CD version 06/2009 (A1 71 827 40 59).