NHTSA ID Number: 11022045
Manufacturer Communication Number: LI27.00-P-077141
TSB/Document Date: 2025-08-21
Summary
Complaint Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid
) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process. Complaint Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process. Complaint Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process.
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TSB/Document ID: LI27.00-P-077141
Replacement Service Bulletin Number:
MFR Communication Date: 2025-08-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Transmission, diagnosis using the Intelligent Predictive Repair (IPR) Tool for DCT transmission
Topic number
LI27.00-P-077141
Version
2
Function group
27.00 - General
Date
8/5/25
Validity
IPR is available for:
- 8FDCT conventional
- 8FDCT hybrid
- 8FDCT AMG Entry Performance (AMG 35)
Reason for change
Availability of IPR expanded
Complaint
Customer complaints regarding automatic transmission 724.1 (8FDCT & 8FDCT hybrid)
For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process.
WIS-References
Document number
Title
Note
SI27.19-P-0014B
Service Information: Diagnosis on au- Transmission 724.1 in model 118,
tomatic transmission
177, 247
Cause
As part of the on-going quality monitoring process and associated quality and damaged part appraisals, a high number of ineffective repairs have been discovered.
Such ineffective repairs have a negative impact on all those involved. For the customer, it means high costs and long
repair times and for the dealer, it may result in the warranty claim being rejected.
Remedy
General note:
IPR is available for:
•
•
•
•
724.1xx: 8FDCT conventional (non hybrid)
724.1xx: 8FDCT hybrid
724.1xx: 8FDCT AMG Entry Performance (AMG 35)
724.1xx: 8FDCT AMG Performance (AMG45, AMG45s)
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•
724.1xx: 8FDCT MOPF (TCM8FDCT_PT4)
IPR is currently not available for:
•
•
•
724.00x: 7FDCT MFA1
724.00x: 7FDCT MFA2
700.xxx: 7FDCT300
Steps for the Service Advisor:
Important: The more information and detail that can be given to the workshop about the complaint, then the more effective the subsequent diagnosis with IPR can be. To this end, a detailed service reception questionnaire has been
provided to help the Service Advisor ask the right questions about the complaint.
·Ask precise details about the customer complaint and the conditions and context.
Operation steps for the workshop employee:
Perform quick test
·Access the transmission control unit via XENTRY Diagnosis
·Select "A customer complaint has been received" and carry out all subsequent operation steps (IPR diagnosis path).
·The IPR repair instructions are displayed. Carry out the IPR repair instructions without performing any further diagnostic or repair steps.
·Important: The IPR repair instructions are binding and must be carried out.
Differing repairs are possible; such repairs must be documented in XENTRY in free text. Please observe the information regarding the IPR diagnosis process in XENTRY.
·Conventional diagnosis and subsequent appropriate repairs are only permitted if IPR does not specify any repair instructions.
·Invoicing for the guided IPR steps: Operation item 27 0640 and 001 WU (5 minutes).
Notice regarding warranty:
·The use of IPR in association with warranty claims is mandatory.
·If the IPR repair instructions are disregarded without justification, the warranty claims may be rejected.
·Tamper-proof documentation:
The IPR repair instructions are stored in the control unit log.
Please file this document in a tamperproof manner - either in digital form or as a hard-copy printout and also enclose
a printout with the damaged part. In this regard, please comply with the country-specific warranty requirements of the
MPC/general distributor.
WIS-References
Document number
Title
Note
OF27.00-P-3000-07A
Analysis sheet for automatic transmis- Transmission 724.1 in model 118,
sion 8G-DCT, form
177, 247
Disclaimer
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
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resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
Symptoms
Power transmission > Function > Jolting/shuddering during start-off
Power transmission > Automatic transmission > Function > Limp-home mode
Power transmission > Function > Rocking/rodeo effect
Power transmission > Function > No power flow
Power transmission > Function > Vibrates
Power transmission > Automatic transmission > Function > Malfunction
Power transmission > Automatic transmission > Function > Poor start-off performance
Power transmission > Automatic transmission > Function > Engaging process
Power transmission > Automatic transmission > Function > No power flow
Power transmission > Automatic transmission > Function > Shifts
Power transmission > Function > Blocks
Power transmission > Automatic transmission > Function > Shuddering during start-off
Power transmission > Automatic transmission > Function > Electrical fault/Fault code
Power transmission > Automatic transmission > Function > Stalls engine
Power transmission > Automatic transmission > Function > Blocks
Power transmission > Automatic transmission > Function > Shudders
Power transmission > Automatic transmission > Function > Slips
Power transmission > Automatic transmission > Function > Shifting is rough
Power transmission > Automatic transmission > Function > Shifting is not performed or is delayed
Power transmission > Automatic transmission > Transmission mode selection > Malfunction, shift mode button S /
W/C/M
Power transmission > Automatic transmission > Function > Poor shift quality
Power transmission > Automatic transmission > Function > Kickdown malfunction
Control unit/fault code
Control unit
Fault text
Y3/14 - Transmission control for 8-speed dual-clutch
transmission (DKG) (TCM9FDCT)
U300000 - The control unit has a malfunction due to redundant monitoring. _
U144D00 - The torque request from control unit 'combustion engine' was not received. _
U143300 - An implausible signal 'Status of circuit 15' was
received. _
U142500 - The signal of accelerator pedal sensor from
control unit 'combustion engine' was not received. _
U142000 - An implausible signal was received from the
electronic selector lever module. _
U140C00 - An implausible right rear wheel speed signal
was received. _
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U140B00 - An implausible left rear wheel speed signal
was received. _
U140A00 - An implausible right front wheel speed signal
was received. _
U140900 - An implausible left front wheel speed signal
was received. _
U140800 - An implausible signal from switch "Brake
lights" was received. _
U140700 - Implausible signal "Engine torque" was received. _
U140600 - The signal 'engine torque' from control unit
'combustion engine' was not received. _
U140500 - The signal 'engine torque' from control unit
'combustion engine' was not received. _
U140400 - The signal 'engine torque' from control unit
'combustion engine' was not received. _
U140200 - The signal 'engine temperature' from control
unit 'combustion engine' was not received. _
U140100 - The signal 'engine rpm' from control unit 'combustion engine' was not received. _
U108B00 - The signal 'park position' was received from
control unit 'electric parking brake". _
U108A00 - The signal 'park position' was received from
control unit 'traction system'. _
U108200 - The signal 'park position' was received from
control unit 'electronic ignition lock'. _
U054487 - Implausible data were received from control
unit 'PARKTRONIC'. _
U042900 - Implausible data were received from the steering column module. _
U044700 - Implausible data were received from the central gateway. _
U042800 - The signal from the steering angle sensor was
not received. _
U041600 - Implausible data were received from control
unit 'Traction system'. _
U040400 - Implausible data were received from the electronic selector lever module. _
U030068 - An internal fault has occurred in the control
unit software. There is incomplete information.
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U030048 - An internal fault has occurred in the control
unit software. There is an error in the control memory.
U030005 - An internal fault has occurred in the control
unit software. There is a programming fault.
U030000 - An internal fault has occurred in the control
unit software. _
U029100 - Communication with the electronic selector lever module has a malfunction. _
U025D00 - Communication with the control unit 'Head
unit' has a malfunction.
U021487 - The CAN signals for function 'XENTRY CANTool' are faulty.
U016800 - Communication with the electronic ignition lock
has a malfunction. _
U015587 - Communication with the instrument cluster has
a malfunction. The message is missing.
U014900 - Communication with control unit "Drivetrain
gateway" has a malfunction. _
U014687 - Communication with the central gateway has a
malfunction. The message is missing.
U014187 - Communication with the front signal acquisition and actuation module has a malfunction. The message
is missing.
U014800 - Communication with control unit 'Drivetrain'
has a malfunction. _
U012900 - Communication with control unit "Regenerative braking system" has a malfunction. _
U012887 - Communication with the electric parking brake
has a malfunction. The message is missing.
U012100 - Communication with ESP has a malfunction. _
U011500 - Communication with control unit 'Drivetrain'
has a malfunction. _
U011187 - Communication with control unit "Battery" has
a malfunction. The message is missing.
U010F87 - Communication with control unit 'Electric A/C
compressor' has a malfunction. The message is missing.
U010487 - Communication with control unit 'Cruise control' has a malfunction. The message is missing.
U010300 - Communication with the electronic selector lever module has a malfunction. _
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U010287 - Communication with the transfer case has a
malfunction. The message is missing.
U010000 - Communication with the control unit 'combustion engine' has a malfunction. _
U000100 - Drive train CAN communication has a malfunction. _
P288300 - The temperature of the clutch is too high.
P287C00 - Initial startup of control unit 'transmission' was
not completed successfully. _
P286500 - The position sensor of shift fork E has a short
circuit to ground. _
P286600 - The position sensor of shift fork E has a short
circuit to positive. _
P286400 - The position sensor of shift fork E has a malfunction. _
P286300 - Position sensor disturbed (posN1)
P285900 - Multidisk clutch 1 has a malfunction. _
P285700 - Multidisk clutch 1 does not close. _
P284D00 - Shift fork A moves unprompted. _
P284E00 - Shift fork B moves unprompted. The following
test procedure must always be performed in its entirety.
P284300 - The position sensor of shift fork D has a short
circuit to positive. _
P284200 - The position sensor of shift fork D has a short
circuit to ground. _
P284100 - The position sensor of shift fork D has a malfunction. _
P284000 - The position sensor of shift fork D has an
electrical fault. _
P283E00 - The position sensor of shift fork C has a short
circuit to positive. _
P283D00 - The position sensor of shift fork C has a short
circuit to ground. _
P283C00 - The position sensor of shift fork C has a malfunction. _
P283B00 - The position sensor of shift fork C has an
electrical fault. _
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P283900 - The position sensor of shift fork B has a short
circuit to positive. _
P283800 - The position sensor of shift fork B has a short
circuit to ground. _
P283700 - The position sensor of shift fork B has a malfunction. _
P283600 - The position sensor of shift fork B has an
electrical fault. _
P283400 - The position sensor of shift fork A has a short
circuit to positive. _
P283300 - The position sensor of shift fork A has a short
circuit to ground. _
P283200 - The position sensor of shift fork A has a malfunction. _
P283100 - The position sensor of shift fork A has an
electrical fault. _
P282B00 - Pressure regulating valve 10 has an electrical
fault. _
P282800 - Pressure regulating valve 10 has a malfunction. _
P282200 - Pressure regulating valve 9 has an electrical
fault. _
P281F00 - Pressure regulating valve 9 has a malfunction.
_
P281900 - Pressure regulating valve 8 has an electrical
fault. _
P281600 - Pressure regulating valve 8 has a malfunction.
_
P281000 - Pressure regulating valve 7 has an electrical
fault. _
P280700 - Pressure regulating valve 7 has a malfunction.
_
P278798 - The temperature of the clutch is too high. The
component or the system has overtemperature.
P274500 - Rpm sensor 2 has an electrical fault. _
P274600 - Rpm sensor 2 has a malfunction. _
P273300 - Pressure regulating valve F has a malfunction.
P273200 - Pressure regulating valve F has a malfunction.
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P272800 - Actuation of pressure regulating valve 5 has a
malfunction. _
P272400 - Pressure regulating valve F does not open.
P272300 - Pressure regulating valve F does not close.
P272200 - Pressure regulating valve 5 has a malfunction.
_
P271600 - Pressure regulating valve 4 has an electrical
fault. _
P271300 - Pressure regulating valve 4 has a malfunction.
_
P271100 - The actuator of hollow shaft and internal shaft
has a malfunction. _
P267F00 - The temperature sensor of the control unit has
a malfunction. _
P263797 - Feedback on the torque control is not received. The system function is restricted.
P24F100 - The wake-up line to the control unit 'Y3/14n4
(Dual clutch transmission fully integrated transmission
control unit)' has a short circuit to positive.
P0C2A00 - The electric machine for the oil pump in the
transmission is blocked. _
P0C2900 - The electric oil pump in the transmission has a
malfunction. _
P0B0D00 - The electric oil pump in the transmission has
an internal fault. _
P0B0900 - The electric oil pump in the transmission has
an electrical fault or open circuit. _
P0A9200 - The alternator of the hybrid system has a malfunction. _
P0A2F00 - Electrical Machine A has overtemperature. _
P094200 - The hydraulic unit has a malfunction. _
P092500 - The shift valve of the hollow shaft has a malfunction. _
P085100 - Position sensor "Park pawl" has an electrical
fault. Short circuit to ground
P092100 - The shift valve of the inner shaft has a malfunction. _
P085200 - Position sensor "Park pawl" has an electrical
fault. Short circuit to positive
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P085000 - The button 'Gear range P' has a malfunction. _
P084800 - Oil pressure sensor B has a short circuit to positive. _
P084700 - Oil pressure sensor B has a short circuit to
ground. _
P084600 - Oil pressure sensor B has a malfunction. _
P084500 - Oil pressure sensor "B" has an electrical fault.
_
P084300 - Oil pressure sensor 'A' has a short circuit to
positive. _
P084200 - Oil pressure sensor 'A' has a short circuit to
ground. _
P084100 - Oil pressure sensor 'A' has a malfunction. _
P084000 - Oil pressure sensor "A" has an electrical fault.
_
P081C00 - Position sensor "Park pawl" has an electrical
fault. _
P07E600 - Park position cannot be deselected. _
P07E400 - Park position cannot be engaged. _
P07C800 - Rpm sensor 2 has a short circuit to positive. _
P07C700 - Rpm sensor 2 has a short circuit to ground. _
P07FF00 - The transmission malfunctions during a cold
start. _
P07C600 - Rpm sensor 1 has a short circuit to positive. _
P07C500 - Rpm sensor 1 has a short circuit to ground. _
P07C000 - Rpm sensor 'Turbine wheel' has a short circuit
to positive. _
P07B571 - Sensor A of the park pawl has an electrical
fault. The actuator is blocked.
P07B500 - Sensor A of the park pawl has an electrical
fault. _
P07B200 - At the wake-up signal from control unit 'Transmission control for 8-speed dual-clutch transmission',
component part 'Park pawl' has an open circuit.
P07A771 - Multidisk clutch 3 does not open. The actuator
is blocked.
P07A500 - Multidisk clutch 2 does not open. _
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P07A300 - Multidisk clutch 1 does not open. _
P079B00 - Slip was detected at multidisk clutch 2. _
P079A00 - Slip was detected at multidisk clutch 1. _
P079800 - Pressure regulating valve 3 has an electrical
fault. _
P079500 - Pressure regulating valve 3 has a malfunction.
_
P079200 - Rpm sensor 1 has a malfunction. _
P079100 - Rpm sensor 1 has an electrical fault. _
P077800 - Pressure regulating valve 2 has an electrical
fault. _
P077600 - Pressure regulating valve 2 does not close. _
P077500 - Pressure regulating valve 2 has a malfunction.
_
P076300 - Solenoid valve 3 has an electrical fault. _
P076100 P076077 - Solenoid valve 3 has a malfunction. The commanded position cannot be reached.
P074800 - Pressure regulating valve 1 has an electrical
fault. _
P074600 - Pressure regulating valve 1 does not close. _
P074500 - Pressure regulating valve 1 has a malfunction.
_
P071600 - The rpm sensor 'Turbine wheel' has a malfunction. _
P071500 - The rpm sensor 'Turbine wheel' has an electrical fault. _
P070246 - Control unit "Transmission" has a malfunction.
There is an error in the calibration or parameterization
memory.
P070200 - Control unit "Transmission" has a malfunction.
_
P070100 - Control unit "Transmission" has a malfunction.
_
P06E400 - Sensor A of the park pawl has an electrical
fault. _
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P06AB01 - Internal temperature sensor 2 of the control
unit has an electrical fault. There is a general electrical
fault.
P06A800 - Output 3 for the reference voltage of the sensors has a malfunction. _
P06A700 - Output 2 for the reference voltage of the sensors has a malfunction. _
P06A600 - Output 1 for the reference voltage of the sensors has a malfunction. _
P066900 - The internal temperature sensor of the control
unit has a short circuit to positive. _
P066800 - The internal temperature sensor of the control
unit has a short circuit to ground. _
P066700 - The internal temperature sensor of the control
unit has a malfunction. _
P066600 - The internal temperature sensor of the control
unit has an electrical fault. _
P064F00 - An unauthorized software calibration was detected. _
P063400 - The temperature in the control unit is too high.
_
P061B00 - The torque calculation of the control unit has a
malfunction. _
P061000 - The coding of the control unit is incorrect. _
P060A00 - The monitoring function in the control unit has
a malfunction. _
P060700 - The control unit has a malfunction. _
P060300 - There is an internal control unit fault in the NVRAM memory. _
P060200 - The control unit is not programmed. _
P056300 - The on-board power supply voltage is too high.
_
P056200 - The on-board power supply voltage is too low.
_
P051300 - The start enable was not issued. _
U300104 - The control unit was switched off improperly.
There is an internal fault.
U140D64 - An implausible wheel speed signal was received. There is an implausible signal.
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P021800 - Transmission oil temperature sensor 1 has detected overtemperature. _
Operation numbers/damage codes
Op. no.
Operation text
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Time
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Damage
code
Note
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