Service bulletin LI46.35-P-077076
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10248157 |
| Published by NHTSA | 2024-01-03 |
| Manufacturer's number | LI46.35-P-077076 |
| Manufacturer's date | 2023-12-04 |
| NHTSA component | STEERING |
NHTSA's summary
Control unit N68 - electric power steering Fault P063544 - The electric power steering has a malfunction. There is a fault in the data memory. with fault freeze frame data "Mon_ID 320" in the "stored" status stored in the fault memory of control unit N68. No functional restrictions of the electric power steering or warning messages are visible. Faults occur in the event of a software update or when initializing the control unit for the electric power steering N68. The fault code can be ignored and the fault memory of the control unit for the electric power steering N68 can be deleted. It is not necessary to replace the electric power steering.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Steering
Trouble codes named
P0635
| MERCEDES-BENZ AMG C43 | 2022 to 2024 |
|---|---|
| MERCEDES-BENZ AMG C63 S | 2022 to 2023 |
| MERCEDES-BENZ AMG C63 S E | 2023 |
| MERCEDES-BENZ AMG CLE53 | 2024 |
| MERCEDES-BENZ AMG CLE63E S | 2024 |
| MERCEDES-BENZ AMG EQE | 2023 to 2024 |
| MERCEDES-BENZ AMG EQS | 2022 to 2024 |
| MERCEDES-BENZ AMG EQS 53 | 2022 to 2023 |
| MERCEDES-BENZ AMG GLC43 | 2023 to 2024 |
| MERCEDES-BENZ AMG GT43 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| MERCEDES-BENZ AMG GT53E | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| MERCEDES-BENZ AMG GT55 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| MERCEDES-BENZ AMG GT63 | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| MERCEDES-BENZ AMG S63 | 2021 |
| MERCEDES-BENZ AMG SL43 | 2022 to 2024 |
| MERCEDES-BENZ AMG SL53E | 2024 |
| MERCEDES-BENZ AMG SL55 | 2022 to 2024 |
| MERCEDES-BENZ AMG SL63 | 2022 to 2023 |
| MERCEDES-BENZ AMG SL63 S E | 2024 |
| MERCEDES-BENZ C 300 | 2022 to 2024 |
| MERCEDES-BENZ E 350 | 2024 |
| MERCEDES-BENZ E 450 | 2024 |
| MERCEDES-BENZ EQE 350+ | 2023 to 2024 |
| MERCEDES-BENZ EQE 500 | 2023 to 2024 |
| MERCEDES-BENZ EQE350 | 2023 |
| MERCEDES-BENZ EQE350+ | 2023 |
| MERCEDES-BENZ EQE500 | 2023 |
| MERCEDES-BENZ EQS 450 | 2022 |
| MERCEDES-BENZ EQS 450+ | 2022 to 2023 |
| MERCEDES-BENZ EQS 580 | 2022 to 2023 |
| MERCEDES-BENZ EQS450 | 2023 |
| MERCEDES-BENZ EQS450+ | 2023 |
| MERCEDES-BENZ EQS580 | 2023 |
| MERCEDES-BENZ GLC 300 | 2023 to 2024 |
| MERCEDES-BENZ S 500 | 2021 |
| MERCEDES-BENZ S 500 | 2023 |
| MERCEDES-BENZ S 500 4MATIC | 2022 |
| MERCEDES-BENZ S 500 4MATIC | 2024 |
| MERCEDES-BENZ S 560 | 2021 |
| MERCEDES-BENZ S 580 | 2021 |
| MERCEDES-BENZ S 580 | 2023 |
| MERCEDES-BENZ S 580 4MATIC | 2022 |
| MERCEDES-BENZ S 580 4MATIC | 2024 |
| MERCEDES-BENZ S 580 E | 2023 |
| MERCEDES-BENZ S 580 E 4MATIC | 2024 |
| MERCEDES-MAYBACH S 560 | 2021 |
| MERCEDES-MAYBACH S 580 | 2021 |
| MERCEDES-MAYBACH S 580 4MATIC | 2022 to 2023 |
| MERCEDES-MAYBACH S 680 | 2023 to 2024 |
| MERCEDES-MAYBACH S 680 4MATIC | 2022 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| LI46.10-P-080896 | 2026-10-06. Service bulletin. Complaint Slight creaking noises when steering. Cause Noises may come from one or more sleeves of the horn contact plate. Remedy Remove the horn contact plate and check the sleeves for noise; see attached video. If necessary, apply lubricant to the sleeves. |
|---|---|
| LI46.35-P-067339 | 2026-09-09. Service bulletin. Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. OR Rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). Complaint does not impact the ability to safely steer or control the vehicle. Cause Ball screw drive (KGT) of electric steering damaged by: 1. External force due to: ‑ Hitting the curb/posts with the front wheels. ‑ Driving over obstacles (e.g. pothole/ threshold/ speed bump/ gully) at an inappropriate speed. 2. Corrosion/ water ingress through a damaged boot (see attachment). ‑ Cracks (1) ‑ High pressure cleaner (2) ‑ Animal bite (3) See various examples listed in the attachments for examples of outside influence. Remedy Remove boot clamps closest to steering gear housing on both left and right (as seen in "Steering Rack Boot Clamp Location"). Pull back boot and inspect for rust, broken end stops, water, or any other anomalies. Replace electric steering. Note: Steering gears replaced due to outside influence or damage must not be claimed under warranty! |
| LI46.10-P-079582 | 2025-08-21. Service bulletin. Complaint Valeo Steering Column Module (N80) goes into bootloader after updating software to A2239028729. To verify the supplier and software number of the steering column module. See attachment "Supplier Identification" for assistance. Cause MRSM/SCCM flashed to SW A2239028729 Remedy Please send VIN specific ID1 Support Package online using the XENTRY Kit used during the time the error occurred. Then, create an XSS ticket using the Support Tool icon under XENTRY Diagnosis. |
| LI46.15-P-063353 | 2025-06-26. Service bulletin. Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function), noise (breakaway noise) when leaving the limit stops of the height adjustment. Cause Height adjustment moves to the top/bottom limit stop and jams. 1. Driver seat control unit software 2. Steering column height adjustment transmission Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle manufacturing date) 1. Perform software update of driver's seat control unit 2. Replace repair kit for steering column height adjustment Procedure 1: Perform software update of driver seat control unit. ALL models except 205/253/293/222/217/231/463/213/238/257/290 up to special equipment code 801. • Move out the fore/aft adjustment to the end position. • Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward • After releasing the jam, perform a software update of the driver's seat control unit If procedure 1 is not effective, there is no new software available for the driver seat control unit, or the chassis is not listed above (167, 223, 294, 206, 294, 295, 296, 297,232,214,254) then use procedure 2. Procedure 2: Replace repair kit for steering column height adjustment. • Move out the fore/aft adjustment to the end position. • Release jamming of height adjustment by knocking with palm of hand onto top of steering wheel/at the same time pressing adjustment switch downward • Remove footwell trim on driver's side. • Determine type version of height adjustment in XENTRY Parts Information and order appropriate replacement part (refer to attachment). 1. Version A: A 231 460 77 00 2. Version B: A 205 460 38 03 • Remove steering column. • Remove height adjustment (adjustment repair kit). • Install repair kit (adjustment repair kit) (observe tightening torque for screws in attachment). • Install steering column. • If possible, flash driver seat control unit to latest software release or code SCN again. • Commission driver seat control unit (normalization of limit stops is deleted and learning process repeated). |
| LI46.10-P-078012 | 2025-05-09. Service bulletin. 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). |
| LI46.10-P-078012 | 2025-05-02. Service bulletin. 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. Test: Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223). Erase fault memory Reset the HOSWD control unit in line with the guided test in Xentry. 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: 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 -> replace steering wheel rim. 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 defect is visible: Please do not replace the steering wheel, but wait for new coding parameters which should be available 05/2025. 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 |
| LI46.15-P-078766 | 2025-01-10. Service bulletin. Complaint Play noticeable in the height adjustment of the steering column. See arrow direction in attached pictures. Cause Slipped thrust bearing ring on the height adjustment. Remedy Install repair kit for height adjustment of the steering column. For tightening torque, see attachment. |
| LI46.80-P-078043 | 2024-07-31. Service bulletin. Complaint Message in the instrument cluster regarding rear axle steering • In the short test, the fault > Actuator blocked < appears Cause Vehicle may detect high adjustment force in the rear axle steering. Remedy Old Hardware: A 290 460 3300 / 3400 > SW A 290 902 7400 Caution! This hardware cannot be flashed with the new version. Only the current hardware with the corresponding previous software release can be flashed. If the vehicle still has the old hardware installed, do not attempt to flash; instead, please create a TIPS case. Current Hardware: A 290 460 3900 / 4000 >> SW A 290 902 5101 This hardware can be flashed with A 290 902 1005. Flash control unit N68/3 and N68/4 with current software release A 290 902 1005 using XD. |
| LI46.10-P-077314 | 2024-02-01. Service bulletin. Noises in the steering column area when steering. Under analysis. Check which area of the steering column the noises occur in. Do the noises tend to occur at the bottom in the driver footwell or do they tend to occur in the area of the steering column switch module (MRSM/SCCM)? If the noises occur in the area of the MRSM/SCCM, work through the following points: - Loosen screws of the MRSM/SCCM and steering wheel, re-align the MRSM/SCCM, and re-fasten the screws (see WIS). Sometimes there is stress at the MRSM/SCCM and noises occur. - If noises continue to occur, swap the MRSM/SCCM into a vehicle without any (noise) complaints. - If the noises occur with the MRSM/SCCM complained about when it is in the vehicle without a complaint (donor vehicle), the MRSM/SCCM can be replaced. - If noises also occur in the customer vehicle with the MRSM/SCCM from the reference vehicle, the MRSM/SCCM is not the cause and must not be replaced. Notes: - When installing the MRSM/SCCM, make sure that no damage occurs! - Only disassemble and mount all component parts in the "straight-ahead position" (see also WIS). - Please refer to this LI in the "Notes" section of the warranty claim! |
| LI46.10-P-077313 | 2024-02-01. Service bulletin. The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers See example file in the attachments area: Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises.mp4 The plastic cover on the back of the steering wheel is not positioned correctly and may therefore rub against the steering column switch module Please use the following noise files for the damaged part analysis: 1. Grinding noise | pot. cause: steering wheel | see attachment: Lenkrad-Schleifgeräusch_SteeringWheel-GrindingNoises. mp4 2. Creaking/cracking noise | pot. cause: steering column switch module | see attachment: MRSM-Schleifgeräusch_ SCCM-GrindingNoises.MOV If the noise is due to the steering column switch module, please use LI46.10-P-077314. Check for grinding areas on the steering wheel: Please check the covers on the rear for protrusion and, if necessary, remount. 1. Mask off openings on back of steering wheel with adhesive tape 1. Mark the back of the steering wheel with colored chalk (see Picture 1) 2. Mount steering wheel on steering column switch module and turn the steering wheel from left lock to right lock ten times. 3. The chalk will now have disappeared in the areas where there is rubbing (see Picture 2) Warning: Ensure that no cables and visible areas of the steering wheel are damaged. The abrasive excess material on the back of the steering wheel must be carefully removed with a Dremel tool. Tip: You will need to remove approx. 0.1 mm to 0.3 mm of material (example: Picture 3) Make sure that none of the ground-off material gets into the steering wheel. After removing the material, clean the entire back of the steering wheel with a 1% soap solution. |