NHTSA ID Number: 10177567
Manufacturer Communication Number: LI27.00-P-071367
TSB/Document Date: 2020-07-27
Summary
When leaving gliding mode, the transmission can shift to neutral by itself. The complaint only occurs in drive program E. Check software release of transmission control unit and perform a software update.
XENTRY TIPS
Transmission shifts sporadically to "Neutral" - Fault co-
de P061B00 is present in control unit Y3/14n4 (DKG)
Topic number LI27.00-P-071367
Version 1
Function group 27.00 General
Date 06-29-2020
Validity BR 177, 118 and 247 with M260 engine and 724.0 (7FD-
CT) transmission up to manufacturing period 03/2020 ap-
prox.
Reason for change
Reason for block
Complaint:
When leaving gliding mode, the transmission can shift to "neutral" by itself.
Fault code P061B00 is present in control unit Y3/14n4 (DKG) in combination with extended freeze frame data 54 40
(see attachment).
The complaint only occurs in drive program "E".
Cause:
When exiting gliding mode, the level 2 monitoring function of the transmission software may detect an impermissible
call of the engine speed interface, and consequently may reset the transmission control unit. As a result of the reset,
the drive range springs back to "neutral" and consequently no power flow is possible. The corresponding transmission
position continues to be displayed in the instrument cluster. The power flow can be immediately restored by moving
the selector lever to "D".
Attachments
File Description
Erweiterte_FU_Daten_P061B00.pdf Extended fault freeze frame data
Remeay:
Important:
Check software release of transmission control unit ***TCM7FDCT***:
For vehicles with the following software release and engine:
* M260 0 A 000 902 42 32, A 000 902 82 37 --> Perform a software update
* M260 + 016 (AMG
35) 0 A 000 902 77 37, A000 902 78 37, A000 902 79 37, A000 902 80 37, A000 902 80 42,A
000 902 81 42 --> Perform a software update
Vehicles with A 000 902 25 74, A000 902 83 42, A 000 902 26 51, A 000 902 27 51 already have the latest version.
06-29-2020 2:33 PM KATSELF
© Copyright Mercedes-Benz AG Page 1/2
XENTRY TIPS
If complaints of this nature are occurring with these vehicles, look for the cause elsewhere. Please create a PTSS ca-
se
If NO later software is available, it is currently still being developed.
Replacing components will NOT remedy the concern, please create a PTSS case.
Symptoms
Power transmission / Automatic transmission / Function / Malfunction
Power transmission / Automatic transmission / Function / No power flow
Power transmission / Automatic transmission / Function / Electrical fault/Fault code
Control unit/fault code
Control unit
Fault code
Fault text
Y3/14n4 - Electronic transmis-
sion control for double-pla-
te clutch transmission (DKG)
P061B00
The torque calculation of the control unit has a malfunction.
(TCM7FDCT)
Validity
Vehicle Engine Transmission
A (177) 260 724.045
A (177) 260 724.033
A (177) 260 724.044
B (247) 260 724.044
B (247) 260 724.033
CLA (118) 260 724.044
CLA (118) 260 724.045
CLA (118) 260 724.033
06-29-2020 2:33 PM KATSELF
© Copyright Mercedes-Benz AG
Page 2/2
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TSB/Document ID: LI27.00-P-071367
Replacement Service Bulletin Number:
MFR Communication Date: 2020-06-29
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM:SOFTWARE
MFR Component System:
MFR Component Subsystem:
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