NHTSA ID Number: 11018204
Manufacturer Communication Number: LI46.10-P-078012
TSB/Document Date: 2025-05-09
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 In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Test: Please perform the new SCN coding for HOSWD control unit (N179/1) (available since May 2025). Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223). Erase fault memory Remedy: Switch on ignition without touching the steering wheel. If after 10 seconds without touching the steering wheel, one of the two fault messages appears in the IC: Please check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). If there is visible damage -> replace steering wheel electronics or feed lines. If there is no visible damage -> Please create TIPS case! If no yellow message appears in the instrument cluster within 10 seconds: Please grab the steering wheel all the way round, including the 6 o'clock chrome molding, with both hands (see picture 1). If the fault is triggered by grabbing the steering wheel rim or pressing on the 6 o'clock clasp, check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). If there is visible damage -> replace steering wheel electronics or feed lines. If no fault is visible: Please open a TIPS case! In the event of a customer complaint and further fault code in HOSWD: B1E7713: Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). B1F1F04: Check hand detection system control unit; if necessary swap with donor vehicle (ensure that the HW part numbers are identical).
Instrument Cluster Message for Active Emergency Stop Assist not active/Active Lane Keep Assist
Topic number
LI46.10-P-078012
Version
5
Function group
46.10 - Steering wheel, jacket tube, steering shaft, steering lock
Date
5/1/25
Validity
Vehicles with capacitive steering wheel with code 266
and manufacturing date as from 2020
Reason for change
Change to remedy due to inclusion of new coding parameters for HOSWD control unit
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
In the event of a customer complaint and
fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in
IDC213 or
fault code in HOSWD control unit: B1E7614
Test:
Please perform the new SCN coding for HOSWD control unit (N179/1) (available since May 2025).
Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223).
Erase fault memory
Remedy:
Switch on ignition without touching the steering wheel.
If after 10 seconds without touching the steering wheel, one of the two fault messages appears in the IC:
Please check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3).
If there is visible damage -> replace steering wheel electronics or feed lines.
If there is no visible damage -> Please create TIPS case!
02.05.2025 15:18
© Copyright Mercedes-Benz
AG
CCUSHWA
Page 1 / 5
If no yellow message appears in the instrument cluster within 10 seconds:
Please grab the steering wheel all the way round, including the 6 o'clock chrome molding, with both hands (see picture 1).
If the fault is triggered by grabbing the steering wheel rim or pressing on the 6 o'clock clasp, check contacts and feed
lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc.
(example in picture 2 and 3). Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4).
If there is visible damage -> replace steering wheel electronics or feed lines.
If no fault is visible: Please open a TIPS case!
In the event of a customer complaint and further fault code in HOSWD:
B1E7713:
Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and
check for corrosion (Picture 4).
B1F1F04:
Check hand detection system control unit; if necessary swap with donor vehicle (ensure that the HW part numbers are
identical).
Attachments
File
Description
Picture 1.PNG
Picture 1 Hand Positions
Picture 2.PNG
Picture 2 Harness damaged
Picture 3.PNG
Picture 3 Harness damaged
02.05.2025 15:18
© 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
02.05.2025 15:18
© 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
02.05.2025 15:18
© Copyright Mercedes-Benz AG
CCUSHWA
Page 4 / 5
Op. no.
Operation text
02.05.2025 15:18
© 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
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: 2025-05-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.