The Mercedes Sound 5 radio/cd Mobis HA1111 unit fitted to later Vito and Sprinter models has the ability to handle external wired audio input and can be modified as shown in this earlier post. What had been assumed at the time of writing was that the radio could only be activated to allow this option using the MB dealer STAR plug in diagnostic tool.
Thanks to a reader of the original post (Mark) who discovered a manual way of activating the AUX mode through access to the radios hidden ‘Test Mode’ without using the MB Star dealer setup. Thanks again for this Mark ! There are other interesting options available to access through this menu too that I hope to investigate further given time. Response to this post has highlighted that there is a possibility current radios of this model (Model years 2012/2013-on) have the manual ‘front panel’ test mode disabled – Sadly if this is the case, you will have to take a trip to your dealer to have your chosen functions enabled via MB Star.
Mark’s original instructions are posted below along with a video that I made to show how to access the Test Mode and what was available once selected. I have made a listing of the available headings within the test mode scroll adding notation to the individual settings if known.
There are a few options that I am yet to fully understand but it should give most readers a general insight into ‘what-does-what’ and the meaning of some of the info displayed within. Please note that if your radio is the Becker Audio 5 NG BE9012 your test mode menu does not display ‘Test Mode’ when first entered, it just displays ‘SOUND 5’ From here you can then scroll through the menu selection as below. You will also notice some of the listed options may or may not be available in the Becker model. (I have found that some EU Becker models do not seem to have the WB USA Weather Band option and also the CD Temperature warning is set at ‘0’ and appears not to function enabled in these versions. However you may find different options are available to you once you enter the Test Mode menu on your own set)
”Switch the radio on without the ignition on, and turn to radio function. Switch off…..then turn radio on again, after 2 sec. press the sound adjustment key (with the 2 notes on it) together with the #4 selector for radio stations. this puts you into the menu of the radios AUX EXT……press the button up key until you see the AUX OFF…..turn the volume dial till it says AUX EXT…..then press left key to finish……..now press CD twice and you should see that button now has two options in the display…….NOW THE AUX IS ACTIVE !!!!!”
Here is my Gen-In video of how to access the TEST MODE adopted from the above information that worked fine for me.
Assumed Functionality and Key Settings
I have taken a ‘first guess’ at what the individual settings mean or relate to – I may be wrong in some cases and there are a few I haven’t worked out yet but hopefully it will provide the basics to go on should you venture into this menu and wish to make some changes.
DEV – Hex ID Tag for the Device
SER – Serial Number of Device
HW – Hardware Date /Week and Year/ (WW/YY)
SW – Software Date /Week and Year/ (WW/YY)
DECK – CD Deck Date /DAY/MONTH/YEAR/VERSION (DD/MM/YY/VV)
PRD – Production Date – /DAY/MONTH/YEAR (DD/MM/YY)
TUN – Tuner ???
FAD – Front to Rear Fader option ON/OFF
GAL – Speed Dependant Volume. GAL is a special circuit which automatically adjusts the radio volume according to vehicle speed. This compensates for higher noise levels at increased speeds.
GAL OFF – No speed dependent volume adjustment
GAL 1 – Volume adjustment set to activate at lower speeds
GAL 7 – Volume adjustment set to activate at higher speeds
TON – Test tone
RDS – ON OFF
TP VOL – RDS Traffic program break in volume level
AREA – Sales Region ECE (Europe)
KW– Short Wave Band Selection option ON OFF (I assume this is SW option see below German radio band translation)
LW– Long Wave Band Selection option ON OFF
LW is “Langwelle”, German for Long Wave (700m – 2000m)
MW is “Mittelwelle”, German for Middle Wave, or AM (185m – 580m)
KW is “Kurzwelle”, German for Short Wave (18.5m – 50m)
UKW is “Ultrakurzwelle”, German for Ultra Short Wave, or FM (87.5 – 108MHz)
WB– USA Weather Band Selection Option ON OFF
USA NOAA Weather Band (WB) Channels
EXT– External audio input selection. OFF or Either ON or AUX for auxiliary wired audio input
SCR– (ID3) ON OFF ????
PHON- MIN Minimum phone break in volume
PHON-MAX Maximum phone break in volume
AMP – Amplifier output ON OFF
CD – T Temperature protection alarm limit for CD player (Disc/Player damage)
CAN – CANbus Security Location HEX Code (This model is blank FE00)
Blacked Out Display – Contrast Set/Test
Clear Display – Backlight Illumination Level Test
RESET – Press SC button to enter defaults and lose all custom settings of this menu
END – End of menu Turn unit off on this point in the menu to save options.