LI82.85-N-074054

Audio 30/40 VIS (Garmin) head unit - Connection failure with smartphone integration
Topic number
LI82.85-N-074054
Version
3
Function group
82.85 - Navigation and Communication systems
Date
6/19/23
Validity
Model 447.6/7 with code E3C (Audio 30) and code E2R
(Radio generation 2)
Model 447.6/7 with code EA4 (Audio 40) and code E2R
(Radio generation 2)
Reason for change
Remedy updated
Complaint
The connection of the customer's smartphone connected via the original USB cable is disconnected after an undefined period of time for no apparent reason.
The Apple iPhone 12 and subsequent models are primarily affected by this.
Cause
Hardware for radio control unit (Audio) (N87/15)
Remedy
Modification to hardware for radio control unit (Audio) (N87/15).
Note: In isolated cases, the replacement chain is not depicted correctly in XENTRY Parts Information (XPI). Please
ensure that one of the following replacement part numbers (suitable for the vehicle equipment) is ordered:
•
Audio30 - A4479002421
•
Audio40 - A4479002721
Note: Please refer to this LI in the "Notes" section of the warranty claim
Symptoms
Overall vehicle > Networking > Combination switch > Function error
Communication/information > Communication > Mobile phone > Telephone > Telephone mode is not selectable
Communication/information > Communication > Mobile phone > Telephone > Telephone/cell phone is not detected
19.06.2023 17:31:45
© Copyright Mercedes-Benz AG
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Communication/information > Communication > Mobile phone > Telephone > Device error
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A4479002421
Audio 30 Head unit
1
May not show as supersession in XPI
X
A4479002721
Audio 40 Head Unit
1
May not show as supersession in XPI
X
Control unit/fault code
Control unit
Fault text
N87/15 - Radio / Radio - Navigation (RD) (HU447)
Operation numbers/damage codes
Op. no.
Operation text
19.06.2023 17:31:45
© Copyright Mercedes-Benz AG
Time
Damage
code
Note
820D2EN
Android Auto/CarPlay head unit
function, telephone not recognized/charged
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