NHTSA ID Number: 10240163
Manufacturer Communication Number: LI82.85-P-071623
TSB/Document Date: 2023-08-02
Summary
The customer may note the following complaints: - The central display may remain dark through the entire drive cycle. The instrument cluster display will remain operational. - No audio is present from the sound system - MBUX multimedia system (A26/17) may not be shown on the initial quick test - Various other MBUX multimedia system (A26/17) related complaints Water ingress through the air vent under the front passenger seat (see attached, note that the vents are facing the rear of the vehicle). As a result, the head unit (A26/17) may become damaged. Inspect the MBUX multimedia system (A16/17) hardware, including all attached wiring and connectors, for traces of water and/or corrosion.
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TSB/Document ID: LI82.85-P-071623
Replacement Service Bulletin Number:
MFR Communication Date: 2023-07-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:ELECTRICAL:INFOTAINMENT
MFR Component System:
MFR Component Subsystem:
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MBUX multimedia system: The central display is dark, various other system complaints
Topic number
LI82.85-P-071623
Version
4
Function group
82.85 - Navigation and Communication systems
Date
2/24/22
Validity
Model series 167 with code 548/549
Reason for change
Remedy updated
Complaint
The customer may note the following complaints:
- The central display may remain dark through the entire drive cycle. The instrument cluster display will remain operational.
- No audio is present from the sound system
- MBUX multimedia system (A26/17) may not be shown on the initial quick test
- Various other MBUX multimedia system (A26/17) related complaints
Cause
Water ingress through the air vent under the front passenger seat (see attached, note that the vents are facing the rear
of the vehicle). As a result, the head unit (A26/17) may become damaged.
Inspect the MBUX multimedia system (A16/17) hardware, including all attached wiring and connectors, for traces of
water and/or corrosion (see attached picture for example).
Attachments
File
Description
MBUX control unit with visible traces of water intrusion.jpg An example of signs of liquid intrusion into passenger
HVAC vent
30.05.2023 17:11:53
© Copyright Mercedes-Benz
AG
IKURTIS
Page 1 / 3
Remedy
Avoid using rubber floor mats for the second row seats on which water can collect and subsequently enter the air vent
under the front passenger seat.
An optimized cover is now available for the air vent under the front passenger seat (see parts note). To avoid a reoccurrence of water damage, install this cover.
Note:
Only consequential damage resulting from the ingress of fluids that can be attributed to a production error is covered
by the warranty.
Fluids that are introduced into the vehicle as a result of environmental influences, incorrect repairs or incorrect use by
the customer are not covered by the warranty.
The damage code specified in this document only applies for the installation of the fan shroud.
Symptoms
Communication/information > Entertainment > Screen/display > Display dark -System running
Communication/information > Entertainment > Screen/display > Frozen screen -system runs
Communication/information > Entertainment > Radio > Radio mode is not selectable
Communication/information > Entertainment > Radio > No audio
Communication/information > Entertainment > Video TV/DVD > TV mode is not selectable
Communication/information > Information display > Displays > Multifunction display > Function > Malfunction
Communication/information > Communication > Navigation > Navigation - Function > No satellite reception
Parts
Part number
ES1 ES2 Designation
A 167 683 14 00
Quantity Note
Cover panel
1
Available as of approx. 04/2021
EPC
X
Attachments
File
Description
air vent cover A1676831400.jpg
Optimized air vent cover
30.05.2023 17:11:53
© Copyright Mercedes-Benz AG
IKURTIS
Page 2 / 3
Operation numbers/damage codes
Op. no.
Operation text
30.05.2023 17:11:53
© Copyright Mercedes-Benz AG
Time
IKURTIS
Damage
code
Note
68T06**
Vehicle floor cover
Page 3 / 3
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