LI82.85-P-071394

MBUX multimedia system: XENTRY diagnosis
message "MBUX multimedia system control unit
is defective (hard drive, internal fault)" appears
Topic number
LI82.85-P-071394
Version
2
Function group
82.85 - Navigation and Communication systems
Date
2/24/21
Validity
Model series 118, 167, 177, 213, 238, 247, 253, 257, and
290 with code 548/549
Reason for change
Remedy updated
Complaint
In XENTRY diagnosis, the message "MBUX multimedia system control unit is defective (hard drive, internal fault)" appears while attempting to communicate with the MBUX multimedia system (A26/17)
Note: Generally the MBUX multimedia system control unit log "HDD smart-data" under "Memory (USB storage device/hard drive)" will show ReallocatedSectorsID05 or PendingSectorsIDC5with a value greater than "0" (see Attachment "HDD sector check.jpg") if this message appears
Cause
MBUX multimedia system (A26/17) hard disk drive (HDD)
Attachments
File
Description
HDD sector
check.jpg
Remedy
Replacement of MBUX multimedia system internal hard drive (see below note)
Note: The hard drive is available separately as a replacement part (see parts note). In XENTRY Diagnosis navigate
to the MBUX multimedia system (A26/17) -> "Adaptations" -> "Teach in processes" -> "Initial start-up of component Hard Disk Head Unit". The XENTRY Diagnosis will test the currently installed HDD and then guide the technician through the HDD replacement and initial start-up process. The replacement procedure is described in AR82.85P-1102A. Be sure to observe ESD guidelines outlined in AH54.00-P-0001-01A. 
Further information on this topic can be found in LI82.85-P-070544
WIS-References
24.02.2021 21:35:00
© Copyright Mercedes-Benz AG
CTENORE
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Document number
Title
Note
AR82.85-P-1102A
Remove/install head unit hard drive
Observe ESD guidelines outlined in
AH54.00-P-0001-01A
Symptoms
Communication/information > Entertainment > Screen/display > Some menus cannot be selected
Communication/information > Entertainment > Display message > Function not available
Communication/information > Communication > Navigation > Navigation - Function > Navigation not selectable/available
Communication/information > Communication > Navigation > Navigation with hard disk > Map update not possible
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A0009062711
Hard drive A-Mid ECE/USA
with code 548+3U6/3U7/3U8
1
Please note the code condition
X
A0009062911
Hard drive A-High ECE/USA
with code 549+3U6/3U7/3U8
1
Please note the code condition
X
Operation numbers/damage codes
Op. no.
Operation text
827741
REPLACE HARD DRIVE OF HEAD UN- ZM
IT (AFTER CHECK)
24.02.2021 21:35:00
© Copyright Mercedes-Benz AG
Time
CTENORE
Damage
code
Note
53306T6
Internal HDD hard drive
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