NHTSA ID Number: 11000622
Manufacturer Communication Number: LI20.10-P-076206
TSB/Document Date: 2024-06-01
Summary
Customer states that the CEL is lit in the instrument cluster Debris in the coolant system Remedy Please refer to the specific repair instructions for the vehicle you are working on in the attachments section of this LI. Before beginning work on the vehicle open a TIPS case and request the tool you will need. In your request include a contact name, phone number, and shipping address for the tool to be sent. Before the tool arrives: • Remove and replace the coolant expansion tank (reservoir) and the main radiator. • Without removing the components: flush the heater core and changeover valve (located in the right front wheel arch) in the opposite direction of flow until no debris remains. Once the tool arrives, proceed with flushing the vehicle per the instructions attached in this LI. A picture of the filter after each flush must be taken. If after the prescribed number of flushing attempts debris is still being collected in the filter, upload all the pictures to the TIPS case and wait for next steps.
All Vehicles Equipped with M139: CEL for P012800 - The coolant
temperature is below the coolant thermostat specified temperature.
Topic number
LI20.10-P-076206
Version
18
Function group
20.10 - Coolant pump, coolant thermostat
Date
5/24/24
Validity
All vehicles with any version of M139 engine
Reason for change
Added models
Complaint
Customer states that the CEL is lit in the instrument cluster
Cause
Debris in the coolant system
Attachments
File
Description
Debris Aft of Sealing Surface of Thermostat.png
Result of Using Light Source to Detect Debris.png
29.05.2024 17:39
© Copyright Mercedes-Benz
AG
CCUSHWA
Page 1 / 7
Debris at Interior Sealing Surface of Thermostat.png
Using Light Source to Detect Debris.png
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Page 2 / 7
Debris near Mating Surface of Thermostat.png
Heavy Debris in Thermostat.png
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Page 3 / 7
CLA_GLA M139 Coolant Diagram.png
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Page 4 / 7
Remedy
Please refer to the specific repair instructions for the vehicle you are working on in the attachments section of this LI.
Before beginning work on the vehicle open a TIPS case and request the tool you will need.
In your request include a contact name, phone number, and shipping address for the tool to be sent.
Before the tool arrives:
•
•
Remove and replace the coolant expansion tank (reservoir) and the main radiator.
Without removing the components: flush the heater core and changeover valve (located in the right front wheel
arch) in the opposite direction of flow until no debris remains.
Once the tool arrives, proceed with flushing the vehicle per the instructions attached in this LI. A picture of the filter after each flush must be taken.
If after the prescribed number of flushing attempts debris is still being collected in the filter, upload all the pictures to
the TIPS case and wait for next steps.
Attachments
File
Description
254 GLC63 Flushing Tool Use.pdf
GLC63
254 GLC43 Flushing Tool Use.pdf
GLC43
206 C43 Flushing Tool Use.pdf
C43
206 C63 Flushing Tool Use.pdf
C63
232 SL43 Flushing Tool Use.pdf
SL43
MFA2 CLA45_GLA45 Flushing Tool Use.pdf
CLA45, GLA45
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
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Page 5 / 7
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 generation > Engine management > Indicator lamp > Engine diagnosis > lit
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A0995004800
ADDITIONAL RADIATOR
1
C43/SL43
X
A0995005901
1
CLA45/GLA45
X
A0995008501
1
C43/SL43
X
A1390104104
M139Q ENGINE
1
CLA45/GLA45 (Only order if instructed via TIPS)
X
A1390104202
M139L (SL43 ENGINE)
1
SL43 (Only order if instructed via
TIPS)
X
A1390107004
M139L (C43 ENGINE)
1
C43 (Only order if instructed via
TIPS)
X
A1392002202
THERMOSTAT
1
All Models
X
A1775008600
COOLANT EXPANSION
RESERVOIR
1
CLA45/GLA45
X
A2065003400
COOLANT EXPANSION
RESERVOIR
1
C43/SL43/GLC43
X
A0995000202
ADDITIONAL RADIATOR
1
GLC43
X
A2545003700
1
GLC43
X
Control unit/fault code
Control unit
Fault text
N3/10 - Motor electronics 'MRG2AMG' for combustion en- P012800 - The coolant temperature is below the coolant
gine 'M139' (ME) (MRG2AMG)
thermostat specified temperature. _
Operation numbers/damage codes
Op. no.
Operation text
Time
540650
Maintain Voltage
0.1
541011
Quick Test
0.2
202470
Thermostat
3.5
547989
Ground Line
0.1
611075
Belly pan center
0.3
611071
Belly Pan front
0.4
401580
Wheel R&R
0.3
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Damage
code
Note
Page 6 / 7
201145
Coolant Drain/Fill
0.3
831762
A/C Extract/Fill
0.6
82112-
Adjust Headlamp
0.6
20-000
Gut Thermostat
NONTime
203865
3.9
203820
Additional Radiator
0.6
881319
Parktronic
0.1
881934
360 Camera
0.3
201030
Install Filter Device and Perform Flushing Routine
ZM
29.05.2024 17:39
© Copyright Mercedes-Benz AG
CCUSHWA
Page 7 / 7
- Unsurpassed freeze protection and anti-boil performance...
- Organic acid technology resists rust, scale & corrosion...
- High-quality additives protect against leaks and won’t...
- Pre-mixed orange formula is ready-to-use in a 50/50 ratio...
- 5 year/150,000 mile guarantee protects against engine...
- Formulated to replace the OEM fluid in Asian make vehicles...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications: JIS K...
- Note: Please check the vehicle specification before...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: LI20.10-P-076206
Replacement Service Bulletin Number:
MFR Communication Date: 2024-05-25
MFR Internal Campaign ID/Software Version: LI20.10-P-076206
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- WHY CHOOSE THE 2025 CR MAX -Upgrade the latest diagnostic capabilities for all vehicles after 1996: upgrade to 49+maintenance services; 46 extra specific functions; real all systems/all control modules diagnose; over 40K+ bidirectional actuation tests for diagnosing all control moduels of cars; Powerful full OBD2 Functions; built-in ECU Coding for BMW
/ Audi/ VW/ RollsRoyce; Fr ee V.A.G Guide Function; Battery retistration for new battery adaptation and more. It covers all vehicle diagnostic services and some special professional vehicle maintenance servces, assists you to do home DIY vehicle maintenance or car repair as a pro technician. - NEWEST IN INNOVATION FULL OBD2 SERVICES- iCarsoft auto car diagnostic scanner compatible with CAN-FD, CR MAX can do it all-reads and clears trouble codes, ALL SYSTEM DIAGNOSIS such as engine, transmission, ABS and airbag etc. CR MAX code reader for all cars can perform I/M Readiness, Live Data, Freeze Frame, Vehicle Information, Monitor Test, On-Board Monitor, E vap System Test,O2 Sensor Test,DTC Library Lookup,etc. (Warm Tips: If you car is after 2023,please contact us for compatibility; 3. It comes with 16PIN OBD2 diagnostic adapter, please check your car diagnostic socket if it is 16pin socket, if your car is 14pin diagnostic socket please contact us for the solution.)
- 49 RESET+ 46 SERVICES- Performs: Oil Reset, EPB,SAS,Throttle, D-P - F, Battery, ABS, Injector, TPMS, Suspension, AC, Head Lamp, Body Stablity, Engine, Tramsmission, Airbag, Seat, Door-Win-Roof, Fuel Pump, Door, E-G- R.+21 NEWEST SERVICES( Need update scanner)-AdBlue, Clutch, Crankshaft, High Voltage Battery, Cruise Control, NO xSensor, Rain Sensor, Stop And Start, Turbocharger, Head Up Display, Radar Camera, Vehicle Setup, Cyliner Misfire Check,Speedlimitassist, ControlUnitReset,OxygenSensor, Seatbelt. Extra 46+ extra services based on car brand.(Tips: Quantity of reset/ calibration fucitons are based on car system that your vehicle model has)
- REVOLUTIONARY 40000+BIDIRECTIONAL ACTIVE TESTS: Upgraded CR Max scanner equip with numberous of actuational test items for covering all available vehicle control modules, no longer only do simple light test or window test like other scanners, performs hardware modules test and software control modules test for checking car units or new updated control moduels work well or not after maintenance/ repair/ re-installation/ control system updated (Example for Benz- Roller Sun Blind test; Backup Camera test ;Self-test; EPB test; Transport Mode test;Boost Pressure Positioner test; Fuel Pump test; AND MORE!!).(Warm tip: The available test items are based on control modules your car has)
- ECU CODING+ BATTERY REGISTRATION- Powerful ECU Coding service for BMW/MINI/RollsRoyce / Audi/VW/Seat/Skoda/Bentley/Bugatti/Lamborghini, Improves Engine Power Performance and Optimizes Fuel Efficiency and Match New Hardware Unit to car and Customized a comfortable Driving Modes and Fixes & Updates Original Software Bug. The battery test function for checking car battery health, perform battery reset (BMS ) for replacing a damaged or aging car battery with a new one and register new battery to car ECU
- 【Looking for More Professional Vehicle Scan Tool?】iCarsoft E660 2026 Upgrade Version OBD2 scan tool can do it all-reads and clears trouble codes on Engine system, ABS system, Transmission system and Airbag system, And with 6 reset function. It covers more than 59 vehicle makes from 1996-2023 models ( included most USA/ Asia / EU vehicle brand) with full OBDII. (As every car model has its-owned specific car system and ECUs, not all car models have full car ECUs which may prevent the scanner from performing all listed system diagnostics or reset services. Therefore, please email to us with car VIN and services required to do scanner's services for a compatibility check before purchasing.)
- 【OE-Level 4 Systems OBD2 Scanner】iCarsoft E660 2026 Upgrade Version diagnostic scanner offers comprehensive OBDII services, allowing you to quickly scan Engine system. It supports functions such as reading and erasing codes, checking I/M readiness, viewing freeze frame data, performing O2 sensor tests, conducting on-board monitoring, testing the evap system, auto VIN retrieval, and reading both generic and specific codes, as well as DTCs and battery tests.
- 【4 Systems Diagnosis for 10000+ Vehicles】 iCarsoft E660 2026 Upgrade Version adopts unique diagnostic software, works well for most Porsche, Benz, BMW, US Ford, Land Rover, Jaguar, Audi, VW, Volvo, Honda, Nissan, Infiniti, Toyota, Lexus, Scion, Isuzu, Hyundai, Kia, Daewoo, Mazda, Sprinter, Mini, Seat, Skoda, SAAB, EU Ford, Holden, AUS Ford, Acura, Subaru, Mitsubishi, Dacia, Renault, Fiat, GM, Chrysler, Citroen, Peugeot, Opel, Smart,Suzuki, Vauxhall, Alfa-Romeo, Lancia and etc.
- 【6 Reset Services】iCarsoft E660 2026 Upgrade Version is a diagnostic tool that offers professional maintenance services, including Oil Reset, EPB, BMS, ETC, SAS, TPMS Reset. It can help you easily reset oil change indicators, recalibrate steering angle sensors, relearn replaced electric parking brake and so on. For optimal vehicle performance and maintenance convenience. (Tips: Please update the softwareafter receiving the product to obtain new service functions)
- 【118+ Real Time Record & Live Graph View】iCarsoft E660 2026 Upgrade Version can automatically record vehicle text history and identify vehicle information. Preserve real-time data information. View & Graph Live Data. Support Data Review and Print. 15 languages: English, German, Dutch, Spanish, French and so on. We promise to offer Lifetime updates (Lifetime free Update via PC), and confidence in products. We also provide 1 year warranty + extra lifetime hardware free repair if you need it in the future. We prioritize user experience & strive to meet your expectations. Please do feel free to reach out to us if you have any question or problem about the usage.
- 【All-in-One Diagnostic Tool for Porsche + 2 Extra Vehicle Brands】New POR V4.0 is a professional car scanner specifically engineered with dedicated software pre-installed for Porsche. You can also download 2 additional software packages FOR FREE from 26 supported brands (e.g., for Benz, for BMW, for Audi, for Land Rover).Upgraded to adopt quad-core 1.3GHz processor and HD touchscreen and professional diagnsotic OS for faster& smooth diagnsotic.LIFETIME FREE UPDATES, NO SUBSCRIPTION COST! PLEASE TELL US YOUR CAR INFORMATION TO OBTAIN A LIST OF ALL COMPATIBLE SERVICES FOR YOUR CAR FIRST (FOR EXAMPLE: BATTERY REGISTRATION FUNCTION IS NOT COMPATIBLE WITH PORSCHE 997.2)
- 【29 MAINTENANCE SERVICES FOR PORSCHE SERIES CARS】 It can perform the 29 reset service for Porsche series cars-Oil Reset; SAS; EPB; BMS; ETC; DP ; ABS Bleeding; Injector Coding; TPMS; Air Suspension; Air Conditioner; Head Lamp; Body Stablity Control; Engine Control; Transmission; AirBag; Seat; DWR; MIS; EG; ODO; Clutch; High Voltage Battery; Cruise Control; Radar/Camera; Vehicle Setup,etc. Up to 49 vehicle-maintenance-services for the extra 2 vehicle brands you installed (Tip: Not all services will be worked on every car mode. Some vehicle models may be lack of certain ECU-control modules to make some services may not work).
- UPGRADE SERVICES: Breaks down 29 services to 234 sub-service for car owners/machinist to perform maintenance based on corresponding sub-modules! The detailed sub-service for sub-modules assist to perform precise vehicle maintenance.Improving the accuracy of car maintenance and reducing potential failure risks caused by whole-module maintenance to main modules.such as Oil Reset is refined into Reset maintenance interval/Reset service interval/Service Reset; Engine Control Reset is refined into Delete adaptation data/Short tests/System tests/Swirl-flap actuator/Bleeding high temperature coolant circuit and more.（sub-services vary based on vehicle model/year）
- 【EXTRA VEHICLE MAINTENANC SERVICES FOR SPECIFIC SYSTEMS】Have no ability to perferm calibration to special/specific systems/modules? This OBD2 scanner solve your troubles- for common systems/modules & for specific sytems/modules, assist you to perform diagnsing/calibration/reset/relearn services for non-common modules to finish your car maintenance/ diagnostic (eg: Central Computer system/module :Function activation/Multimedia interface test/AM Field Strength/Current FM Field Strength/FM Field Strength/MOST system reserve/Self-test/Deactivate Production Mode/Reset to factory settings/MOST System Test). (Tip: The services vary based on the vehicle brands)
- 【 MORE PROFESSIONAL BI-DIRECTIONAL ACTUATION TESET 】Exclusive POR V4.0 comes with powerful bidirectional testing capability,do actuaction test for deeper unit-checking after replacement or overhaul (1333 test items for Porsche, like:Fuel high-pressure fuel injector 1-4, Empty tank, Radiator fan, OTA-FC Connectivity, backrest, Backup battery, and more; 2136 test items for Audi; 1670 test items for Benz; 1599 test items for Volvo; 1360 test items for VW; 2705 test items for GM etc.). Help to check your car units work well or not after vehicle maintenance or daily car-body check, keep drives always in safety.(Warm tip:The quantity of test item is based on the units your car has)
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.