NHTSA ID Number: 11013996
Manufacturer Communication Number: LI46.10-P-078012
TSB/Document Date: 2025-02-07
Summary
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy Test Procedure: Perform an initial quick test with freeze frame data. Save the N179 - Hand detection system (HE) and N62/4 - Driver assistance system (SG-FAS) control unit logs. Note the fault frequency of fault codes set. Delete the N179 and N62/4 fault memory. Using both hands, "scan" the steering wheel all the way round, including the chrome molding at 6 o'clock (see Picture 1). Read out fault memory and follow steps below for any faults set. Remedy: Vehicles with control unit N179 - Hand detection system (HE): B1E7614: Check contacts and wiring harness in steering wheel by carrying out a visual check for damage, pinched areas, loose connections, etc. (examples in Figs. 2 and 3); If no damage is noted replace the N135 - Steering wheel electronics (LRE) and reassess. If fault code returns replace the steering wheel. B1E7713: Please check the wires and connections in the steering wheel. Afterwards, please check whether the complaint is caused by over torqued screws on steering wheel trim pieces. To do this, please loosen the screws slightly and reevaluate the situation. (Picture 4). P164456: Perform SCN coding. P1CA000: Perform an initial start-up on the N179 hand detection control unit. Faults in N62/4 - Driver assistance system (SG-FAS) control unit with U186B29, U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the N179 control unit: Scan steering wheel as indicated in the test procedure and check whether the fault is reproducible. If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. Software for the N62/4 - Driver assistance system (SG-FAS) is now available for Star 3 vehicles only. Fault in IDC223 control unit: U186B29: Delete fault memory and flash the new IDC (N62/4) software A223 902 75 37. If the software update is not available, or the problem persists, create a TIPS case. Fault in IDC213 control unit: U0429E0, U042941, U042929, U042902, U0429E1: If no fault is stored in the HOSWD control unit then scan the steering wheel and check whether the fault is reproducible. If reproducible: Create a TIPS case, adding the note "reproducible". If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit are precautionary messages. New coding parameters (SCN) will be available in Q2/2025 for the HOSWD control unit.
Instrument Cluster Message for Active Emergency Stop Assist not active/Active Lane Keep Assist
Topic number
LI46.10-P-078012
Version
3
Function group
46.10 - Steering wheel, jacket tube, steering shaft, steering lock
Date
2/3/25
Validity
Vehicles with capacitive steering wheel with code 266
and manufacturing date as from 2020
Reason for change
Remedy Adjusted
Complaint
Hand detection system not operating correctly / vehicles with code 266
Fault message in instrument cluster:
"Active Emergency Stop Assist not available"
"Active Lane Keeping Assist not available"
Cause
Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness.
Remedy
Test Procedure:
Perform an initial quick test with freeze frame data. Save the N179 - Hand detection system (HE) and N62/4 - Driver
assistance system (SG-FAS) control unit logs. Note the fault frequency of fault codes set.
Delete the N179 and N62/4 fault memory.
Using both hands, "scan" the steering wheel all the way round, including the chrome molding at 6 o'clock (see Picture
1).
Read out fault memory and follow steps below for any faults set.
Remedy:
Vehicles with control unit N179 - Hand detection system (HE):
B1E7614:
Check contacts and wiring harness in steering wheel by carrying out a visual check for damage, pinched areas, loose connections, etc. (examples in Figs. 2 and 3); If no damage is noted replace the N135 - Steering wheel electronics
(LRE) and reassess. If fault code returns replace the steering wheel.
B1E7713:
Please check the wires and connections in the steering wheel. Afterwards, please check whether the complaint is
caused by over torqued screws on steering wheel trim pieces. To do this, please loosen the screws slightly and reevaluate the situation. (Picture 4).
P164456:
Perform SCN coding.
P1CA000:
Perform an initial start-up on the N179 hand detection control unit.
06.02.2025 16:51
© Copyright Mercedes-Benz
AG
CCUSHWA
Page 1 / 5
Faults in N62/4 - Driver assistance system (SG-FAS) control unit with U186B29, U0429E0, U042941, U042929,
U042902, U0429E1:
If no fault is stored in the N179 control unit:
Scan steering wheel as indicated in the test procedure and check whether the fault is reproducible.
If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit
are precautionary messages.
Software for the N62/4 - Driver assistance system (SG-FAS) is now available for Star 3 vehicles only.
Fault in IDC223 control unit:
U186B29:
Delete fault memory and flash the new IDC (N62/4) software A223 902 75 37. If the software update is not available,
or the problem persists, create a TIPS case.
Fault in IDC213 control unit:
U0429E0, U042941, U042929, U042902, U0429E1:
If no fault is stored in the HOSWD control unit then scan the steering wheel and check whether the fault is reproducible.
If reproducible: Create a TIPS case, adding the note "reproducible".
If no fault code is stored in the hand detection control unit, the fault codes in the driver assistance systems control unit
are precautionary messages. New coding parameters (SCN) will be available in Q2/2025 for the HOSWD control unit.
Attachments
File
Description
Picture 1.PNG
Picture 1 Hand Positions
Picture 2.PNG
Picture 2 Harness damaged
Picture 3.PNG
Picture 3 Harness damaged
06.02.2025 16:51
© Copyright Mercedes-Benz AG
CCUSHWA
Page 2 / 5
Picture 4.jpg
Picture 4 Screw connections
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
Chassis/suspension > Brake system > Brakes/traction regulation system > Brake assist system BAS > Display message > Brake assist - not available
Lighting > Exterior lights > Driving lights > Adaptive Highbeam Assist > Warning message in instrument cluster
06.02.2025 16:51
© Copyright Mercedes-Benz AG
CCUSHWA
Page 3 / 5
Communication/information > Assistance and warning systems > Active Steering Assist > Malfunction
Communication/information > Assistance and warning systems > Active Steering Assist > Warning message in instrument cluster
Control unit/fault code
Control unit
Fault text
N179 - Hand detection system (HE) (HOSWD223)
P1CA000 - Initial startup was not performed. _
P164456 - An incorrect variant coding or configuration
was detected. An incorrect or incompatible configuration
was detected.
B1F1F04 - Control unit 'Hand-detection system' has a
malfunction. There is an internal fault.
B1E7713 - The ground connection of the control unit
'Hand detection system' has a malfunction. There is an
open circuit.
B1E7614 - The sensor mat of the control unit 'Hand detection system' has a malfunction. There is a short circuit
to ground or an open circuit.
N62/4 - Driver assistance system (SG-FAS) (IDC223)
U186B29 - Communication with control unit 'Hand detection system' has a malfunction. There is an invalid signal.
N179 - Hand detection system (HE) (HOSWD213)
P1CA000 - Initial startup was not performed. _
P164456 - An incorrect variant coding or configuration
was detected. An incorrect or incompatible configuration
was detected.
B1F1F04 - Control unit 'Hand-detection system' has a
malfunction. There is an internal fault.
B1E7713 - The ground connection of the control unit
'Hand detection system' has a malfunction. There is an
open circuit.
B1E7614 - The sensor mat of the control unit 'Hand detection system' has a malfunction. There is a short circuit
to ground or an open circuit.
N62/4 - Mercedes-Benz Intelligent Drive (SG-FAS)
(IDC213)
U0429E1 - Implausible data were received from the steering column module. _
U042902 - Implausible data were received from the steering column module. There is a general signal fault.
U042929 - Implausible data were received from the steering column module. There is an invalid signal.
U042941 - Implausible data were received from the steering column module. There is a general checksum error.
U0429E0 - Implausible data were received from the steering column module. _
Operation numbers/damage codes
06.02.2025 16:51
© Copyright Mercedes-Benz AG
CCUSHWA
Page 4 / 5
Op. no.
Operation text
06.02.2025 16:51
© Copyright Mercedes-Benz AG
Time
CCUSHWA
Damage
code
Note
46248GI
Steering wheel - faulty hand detection system
46803
Hand detection control unit
5983Z
Contacts/line, hand detection control
unit
Page 5 / 5
- Advanced VCI Box, Industry-leading J2534 Pass-Thru...
- High-Speed OEM-Level Diagnostics & Programming: Unlock true...
- Coverage for 17 Car Brands & Ultra Reliability: Works...
- User-Friendly RLink Platform & Expert Support: TOPDON’s...
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J...
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: LI46.10-P-078012
Replacement Service Bulletin Number:
MFR Communication Date: 2025-02-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- Obd2 Bluetooth Scanner Lifetime Update: Ediag Elite offers revolutionary Advantage Lifetime Updates with unlimited access to the superior 15 reset service, bidirectional testing and full system diagnostics.The Ediag Elite is an excellent Bluetooth obd2 scanner diagnostic tool ideal for diy's and private car owners
- Bidirectional Control for Quickly Locating Problems: The Bidirectional Scan tool allows you to send commands directly from your smartphone to your vehicle for active testing. This feature helps to quickly narrow down problems such as air conditioning clutches, windows, doors, sunroofs, etc., reducing diagnostic time for mechanics and helping Diy users locate faults more easily. In addition, Ediag Elite provides fault analysis and repair guidance to help you solve problems efficiently.
- 15 Maintenance Resets: The current version introduces 15 popular special features: Oil Reset, Headlight Matching, Bleeding Reset, TPMS Reset, BMS Reset, Gear Box Relearn, Throttle Learning, Injector Coding, SAS Reset and more special functions in system diagnose menu. These functions make it easy for owners to carry out the necessary maintenance and servicing, ensuring that your vehicle stays in top condition, prolonging its service life and preventing common problems and breakdowns. Note: The Special function vary by model& year, Reach us check compatibility.
- Wide Compatibility CANFD & FCA
Autoauth: Compatible with GM, Ford, Toyota, Chrysler, Honda, Mazda, Nissan, Mitsubishi, Hyundai, KIA with standard OBD2 port from 1996 to newer. More car brands and features will be released gradually. Newest Ediag Elite scanner supports CANFD Protocol and FCA cars. Note: Coverage may vary on different vehicle by model& year ,Please contact us to confirm compatibility before purchase. - Perfect for Monitoring The Health of Your Vehicle: Ediag Elite is designed to make vehicle maintenance simple and efficient. With intelligent AutoVIN quick recognition, it is easy to connect to your car without the need for manual input. Real-time data is visualized in a variety of formats, including graphs, numeric, meter displays and clear 4-in-1 data charts, allowing you to effortlessly monitor real-time data. Data logging/reporting is available for playback and further analysis.
- No Annual Fees & 2026 Upgraded CAN FD: Why pay $199/year or more for updates? The 2026 newest Kingbolen K7 obd2 scanner features have been upgraded to Lifetime Updates without subscription fees, saving you significant costs in the long run. K7 scan tool also adds the CAN FD protocol for the latest GM models (2019+), enabling faster data transfer, reducing the risk of undetected errors
- 2026 Newest Top-tier Car Scanner: Kingbolen K7 diagnostic scan tool is equipped with most capabilities for daily repair/maintenance: Wireless diagnosis via Bluetooth, Bidirectional Test, ECU Online/Offline Code, 31+ Resets, PMI for Ford, Lincoln, Mazda, Global version for 100+ brand vehicles and 17 languages, no area limit, FCA AutoAuth
- OE-Level Full Systems Scan Tool: K7 professional diagnostic scanner with Auto Vin can do one-click to scan ECUs on most of vehicles, like pcm, ecm, eps, bcm, tpms, sas, a/c system... to read/clear code, view live data, freeze frame, read ecu info. 4-in-1 data stream graphics can make data viewing more intuitive. Detailed diagnostic reports will help you easily master the car situation as it can be shared by bluetooth or email! Adding workshop information can help your customers to know more
- Bidirectional Test/Active Test & ECU Code: Stop guessing and start fixing. Bidirectional scan tool Kingbolen K7 can perform real active test that can send commands to the vehicle's ECU to drive the actuators to work, like window, rear mirrors, sunroof, door, solenoids, wipers, headlamp, etc, helping you quickly find out bad parts and pinpoint faulty issues. K7 bidirectional scanner will be a good choice to save money and time on car repairs when performing complex maintenance and repair
- 31 Reset Functions: Avoid expensive dealership visits for simple services. Experience tells us that just a small repair service may cost a lot of money. Kingbolen K7 is a professional diagnostic scanner with 31 common maintenance services like Oil /SAS/EPB/TPMS Reset, Battery Matching, ABS Bleeding, Injector Code, etc. It effectively handles most of the car reset and relearning jobs, perfect for experienced DIYers and mechanics. Note: Functions in the menu vary across vehicles. Kindly check the compatibility before purchase
- 【Lifetime Database & Software Updates— No Subscription Fee, No Feature Lock, Save you $399/Y】KINGBOLEN K8 Pro's software can already be permanently upgraded and used for while software of other same price product still needs annual fee of almost $400. K8 pro scanner has packed all capabilities auto technicians would ever need for repair & maintenance services: Added CAN-FD & DOIP protocol, Bluetooth Wireless Diagnosis, Bidirectional Test, ECU Online/Offline Code & Guided Functions for VW, for Audi...34+ Restes, Autoauth for FCA SGW, Larger 4GB+64GB memory, 12600mAh battery, 8'' touch screen with 1280 * 800 Resolution. A Kickstand can allow the tablet to sit at a comfortable angle
- 【Newly Added CAN FD & DOIP Protocol】As Upgrade Version of Kingbolen K8, K8 Pro obd2 scanner supports CANFD and DOIP protocol, which will save you 200+ bucks as no need extra buy for special adapter. CANFD protocol suits for the latest GM(2019-), reducing the risk of undetected errors. The DoIP protocol (comes with DoIp cable) fits for 2017+ BMW(F&G chassis), for Jaguar & Land Rover after 2017, for Volvo after 2018. Plus, K8 Pro's Memory from 2G+32G expanded to 4G+64G, update period extended from 2 years to permanent
- 【34+ Hot Special Functions & V.A.G Guide】KINGBOLEN K8 pro bluetooth obd2 scanner covers almost all common services including Oil Reset, EPB, SAS, BMS Reset, ABS bleed, Throttle Reset, Suspension, Injector Code, Power Balance, Transmission Adaptation, Fuel Trim Learn, HVAC Control Module Calibrate, Language Change, A/F Settings, Stop/Start Reset, Crankshaft Sensor Relearn, TPMS, PMI function and etc. Imagine how much money and time you spend on car maintenance every year? K8 pro car scanner will be a good helper and saver for your car. V.A.G Guided function provides step-by-step guide to work for Volkswagen/Audi/Skoda. Note: Please send us model/year/vin to check compatibility before order
- 【Powerful Bidirectional Test/Active Test & ECU Code】As a bidirectional scan tool, KINGBOLEN K8 pro allows you to request information from a vehicle's ECU or send commands to the vehicle's modules to perform specific tests and functions, such as EVAP Tests, Turn on/off radiator fan, Window/Mirror/Door Lock Test, Pump and Value Tests, Sound horn Test, et. Without using the vehicle control system and dismantling car’s parts, it can quickly and accurately pinpoint the fault causes, simple operation saves time and money
- 【Wireless OE-Level All Systems Diagnostics】Equipped with Bluetooth VCI, you can do car diagnostics out of the car (up to 33F/10M) without being confined to a small space inside the car. Provides the convenience of Auto VIN, K8 pro allowing for easy access and diagnosis of all available modules on a wide range of vehicles, like PCM, ECM, BCM, TPMS, SAS, Fuel System, etc, to perform read/clear codes, view live data, freeze frame, perform active tests, and read ECU info... 12-In-1 Data Stream Graphics make data viewing more intuitive.Diagnostic reports can be shared via QR Code, Bluetooth or email.Built-in Browser and Fault Code Library allows you directly query the fault code when diagnosing
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.