NHTSA ID Number: 11022048
Manufacturer Communication Number: LI27.60-P-071321
TSB/Document Date: 2025-08-21
Summary
Complaint Transmission limp-home mode with fault message in IC "Gear Change to R Not Possible", the even gears are locked. The concern of transmission limp-home mode disappears after the ignition is switched off and on again. P092500 The shift valve of the hollow shaft has a malfunction. _ is present in the DKG Control Unit (Y3/14n4), and the extended freeze frame data shows hex code 25 F2 (see attachments for reference) Cause Hydraulic fault caused by the transmission software. The engagement of 2nd gear by preselection after 4-3 downshift does not function due to activation fault. Remedy Check the transmission software level and follow the steps below: You can use the EEPROM as txt file for Program version (see attachments for reference) 18a software: Flash transmission control unit Y3/14nY with latest software using Xentry, version 09/2021 or 12/2021 and all add-ons (except model designations 118.351, 118.651, 177.051, 177.151, 177.951); delete fault memory. 18b software: Flash transmission control unit Y3/14nY with latest software using Xentry, version 12/2023 and all add-ons If there is no software available for the DKG Control Unit, or the concern is still present after the software update: Please submit a TIPS case to the Powertrain Inbox and include the following information: - Initial Quick Test w/ Freeze Frame Data - DKG Control Unit Log - Guided Test result for P092500 - Initial EEPROM (before performing any adaptations) - Current EEPROM data
177 118 247 with 724.0 7FDCT - Transmission in limp-home mode, fault message in IC "Gear Change to R Not Possible"! P092500
Topic number
LI27.60-P-071321
Version
6
Function group
27.60 - Gearshift, control
Date
8/7/25
Validity
BR 177, 118 and 247 with M260 engine and 724.0
(7FDCT) transmission.
(Except model designations 118.351, 118.651, 177.051,
177.151, 177.951)
Reason for change
Updated Remedy to include information for TIPS case.
Edited title, added more info to validity
Complaint
Transmission limp-home mode with fault message in IC "Gear Change to R Not Possible", the even gears are locked.
The concern of transmission limp-home mode disappears after the ignition is switched off and on again.
P092500 The shift valve of the hollow shaft has a malfunction. _ is present in the DKG Control Unit (Y3/14n4), and the
extended freeze frame data shows hex code 25 F2 (see attachments for reference)
Cause
Hydraulic fault caused by the transmission software. The engagement of 2nd gear by preselection after 4-3 downshift
does not function due to activation fault.
Attachments
File
Description
Erweiterte_FU_Daten_P092500.pdf
Extended fault freeze frame data
Program stand 18b example.PNG
Checking Software Level in EEPROM txt file
07.08.2025 17:16
© Copyright Mercedes-Benz
AG
CCUSHWA
Page 1 / 3
Remedy
Check the transmission software level and follow the steps below:
You can use the EEPROM as txt file for Program version (see attachments for reference)
18a software:
Flash transmission control unit Y3/14nY with latest software using Xentry, version 09/2021 or 12/2021 and all add-ons
(except model designations 118.351, 118.651, 177.051, 177.151, 177.951); delete fault memory.
18b software:
Flash transmission control unit Y3/14nY with latest software using Xentry, version 12/2023 and all add-ons
If there is no software available for the DKG Control Unit, or the concern is still present after the software update:
Please submit a TIPS case to the Powertrain Inbox and include the following information:
- Initial Quick Test w/ Freeze Frame Data
- DKG Control Unit Log
- Guided Test result for P092500
- Initial EEPROM (before performing any adaptations)
- Current EEPROM data
07.08.2025 17:16
© Copyright Mercedes-Benz AG
CCUSHWA
Page 2 / 3
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
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 > Automatic transmission > Function > Limp-home mode
Power transmission > Automatic transmission > Function > Shifting is not performed or is delayed
Power transmission > Automatic transmission > Drive position selection > Function > Gear cannot be engaged
Power transmission > Automatic transmission > Drive position selection > Function > Malfunction
Control unit/fault code
Control unit
Fault text
Y3/14 - Transmission control for 7-speed dual-clutch
transmission (DKG) (TCM7FDCT)
P092500 - The shift valve of the hollow shaft has a malfunction. _
Y3/14 - Transmission control for 7-speed dual-clutch
transmission (DKG) (TCM7FDCT)
P092500 - The shift valve of the hollow shaft has a malfunction. _
Y3/14 - Transmission control for 7-speed dual-clutch
transmission (DKG) (TCM7FDCT)
P092500 - The shift valve of the hollow shaft has a malfunction. _
Operation numbers/damage codes
Op. no.
Operation text
07.08.2025 17:16
© Copyright Mercedes-Benz AG
Time
CCUSHWA
Damage
code
Note
Page 3 / 3
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TSB/Document ID: LI27.60-P-071321
Replacement Service Bulletin Number:
MFR Communication Date: 2025-08-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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