LI77.21-P-075807

Sliding Sunroof Panel of Panoramic Sliding Roof Reversed
(Temporarily, Once, or Multiple Times) During Closing Process
Topic number
LI77.21-P-075807
Version
2
Function group
77.21 - Panoramic roof
Date
10/2/23
Validity
Model series 254 with SA code 413 (Panoramic roof)
Reason for change
Use of new parameter data record (PMD) for corresponding software (SW): - PMD A2549034402 for SW
A2549025202 (or newer releases - series, field: Determination of the SW/PMD item number via XENTRY) - PMD
A2549034802 for SW A2549027402 or A2549029702 (or
newer releases - series, field: Determination of the SW/
PMD item number via XENTRY)
Complaint
Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process
without entrapment event.
Cause
Sensitive parameterization of the automatic reversing function of the panoramic roof.
Remedy
Perform SW update of panoramic roof control unit (PSD, A98, TSSR254).
WIS-References
Document number
Title
Note
AD00.00-P-2000-06FR
Connect/disconnect diagnostic device -
Symptoms
Body > Roof system > Tilting/sliding sunroof system > Does not close
Operation numbers/damage codes
Op. no.
Operation text
540650
540991
Damage
code
Note
Maintain on-board electrical system voltage (for testing and diagnosis work)
8201DGR
Work must only be invoiced once
per workshop order.
Program and code control unit (maintain
after quick test incl. on-board electrical
system voltage)
8201DGR
02.10.2023 14:56:13
© Copyright Mercedes-Benz AG
Time
RROWELL
Page 1 / 2
541011
Perform quick test
8201DGR
776901
Standardize panoramic sliding sunroof
and teach in automatic reversing function (after quick test)
8201DGR
02.10.2023 14:56:13
© Copyright Mercedes-Benz AG
RROWELL
Work must only be invoiced once
per workshop order.
Page 2 / 2