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Service bulletin LI32 25-P-069660

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10160627
Published by NHTSA2019-06-03
Manufacturer's numberLI32 25-P-069660
Manufacturer's date2019-04-09
NHTSA componentSUSPENSION

NHTSA's summary

G Facelift 2018: Knocking noises from rear area on rough roads

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

Suspension

Vehicles listed
MERCEDES BENZ C2052019
MERCEDES BENZ S2172019
MERCEDES BENZ S2222019
MERCEDES-BENZ A 2202019
MERCEDES-BENZ AMG C432019
MERCEDES-BENZ AMG C632019
MERCEDES-BENZ AMG C63 S2019
MERCEDES-BENZ AMG CLS532019
MERCEDES-BENZ AMG E532019
MERCEDES-BENZ AMG E63S2019
MERCEDES-BENZ AMG GLC432019
MERCEDES-BENZ AMG GLC632019
MERCEDES-BENZ AMG GLC63S2019
MERCEDES-BENZ AMG GT2019
MERCEDES-BENZ AMG GT S2019 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ AMG S632019
MERCEDES-BENZ AMG S652019
MERCEDES-BENZ B 1802019
MERCEDES-BENZ B 2002019
MERCEDES-BENZ B 2202019
MERCEDES-BENZ C 3002019
MERCEDES-BENZ C 350 E2019
MERCEDES-BENZ CLA 2502019
MERCEDES-BENZ CLS 4502019
MERCEDES-BENZ E 3002019
MERCEDES-BENZ E 4502019
MERCEDES-BENZ E2132019
MERCEDES-BENZ E2382019
MERCEDES-BENZ G 5502019
MERCEDES-BENZ G632019
MERCEDES-BENZ GLA 2502019
MERCEDES-BENZ GLC 3002019
MERCEDES-BENZ GLC350E2019
MERCEDES-BENZ GLE2019
MERCEDES-BENZ GLS 4502019
MERCEDES-BENZ METRIS2019
MERCEDES-BENZ S 4502019
MERCEDES-BENZ S5602019
MERCEDES-BENZ SPRINTER (VS30)2019 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ SPRINTER 25002019 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ SPRINTER 35002019 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-MAYBACH S 560 4MATIC2019
MERCEDES-MAYBACH S 6502019

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20203492020-07-29. Suspension
20V4270002020-07-27. SUSPENSION:REAR; SUSPENSION:FRONT:STABILIZER BAR
20V4260002020-07-27. SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:LEAF

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
LI33.20-P-0784062026-07-14. Service bulletin. Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Throttle Lift-Off Noise - Rear) LI33.30-P-056665 (Throttle Lift-Off Noise - Front) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: • If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. • If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner as seen in the attached pictures. NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease). See the attached steering knuckle and wheel hub pictures for reference. NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: • Model series 192: xxx xxx xx 002 876 • Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.
LI33.20-P-0784062026-07-08. Service bulletin. Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Throttle Lift-Off Noise - Rear) LI33.30-P-056665 (Throttle Lift-Off Noise - Front) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: • If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. • If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: • Model series 192: xxx xxx xx 002 876 • Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.
LI40.10-P-0610322026-05-18. Service bulletin. Complaint Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files locally and play them with Windows Media Player. Cause Driving with summer tires in combination with low outside temperatures. At low outside temperatures or in wet conditions, a noise may be produced at the outer wheel on the front axle while maneuvering with sharp steering angles. Note: AMG vehicles with 4MATIC of model series 217 (without code 494) and model series 222 have a modified axle geometry compared with series production vehicles to provide more sporty handling. The problem cannot be remedied by changing the axle settings.
PSL-NCU Return Parts 5/152026-05-18. Other. The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, June 4, 2026. After June 4th, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.
LI33.20-P-0784062026-04-17. Service bulletin. Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. Sound file attached for comparison. MUST match noise for proper diagnosis. NOTE: Steering functionality is not affected. Cause Contact area between wheel bearing and steering knuckle. See also: LI35.30-P-058566 (Axle Half Shaft noise when changing direction - Front) LI33.30-P-056665 (Axle Half Shaft noise when changing direction - Rear) LI40.10-P-059248 (Wheel cracking noise when cornering) Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present after re-testing: • If 192/232 chassis, verify FIN is in the listed range below in "Operation B" and perform. • If not 192/232 chassis or vehicle is a 192/232 not in the listed FIN range, additional verifications of where the noise is coming from are needed. Use multiple channel NVH method to narrow down location. Verify the LI's listed above were completed or if there are other similar noises associated with the chassis (Example: 192/232 also has under panel noises and an associated LI). Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing, steering knuckle, and axle mating face with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: Axle mating face greasing is also covered in LI35.30-P-058566 and LI33.30-P-056665. Operation B (Only applies to 192 and 232 in listed FIN range): Only affects vehicles up to FIN end number: • Model series 192: xxx xxx xx 002 876 • Model series 232: xxx xxx xx 022 312 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.
LI40.10-P-0592482025-10-17. Service bulletin. Complaint Crackling and cracking noise from the outer wheel on the front axle when cornering Cause The noise is generated by a micromovement on the contact surface between the rim and the brake disk (wheel bolt group) and may be intensified by potential soiling. The more lightweight rim (AMG forged rim) transmits the noise louder; in the case of cast rims, the noise is generally not perceptible. This is not a technical defect, but rather a complaint concerning comfort. Safe operation of the vehicle is ensured at all times. Remedy Important note: The operations described below do not represent a permanent remedy in every case. The noise may reoccur again after an indefinite period of time; sanding the rims with abrasive media multiple times is not permissible. Only cleaning using the Hazet tool 4960-160 (recommendation) can be performed without any concerns each time the wheel is changed or if the complaint reoccurs. Replacing the parts (rim, wheel bolts, wheel bearings, wheel hub, brake disk) is not expedient in the event of this complaint. Clean the components of the wheel bolt connection according to the WIS instructions Sand down the rim and brake disk bowl by performing the following steps: • Manually sand rim (old design only) in area of water drain bores (Figure 1; item A), approx. 1.5 cm left and right of water drain bore (Figure 2) Note: Use abrasive paper with grit size 80. The grooving in this area should no longer be visible (sand down approx. 0.1-0.2mm) • Also sand brake disk bowl using emery cloth or abrasive paper with a grain size of 120 • For vehicles equipped with the AMG ceramic brake system (B07), abrasive paper may not be used for cleaning on the brake disk side Note: Do not use any cleaning agent when cleaning on the rim side. Cleaning using abrasive paper with a grain size of 80 will suffice. Do not apply any grease, lubricant or paste after cleaning The brake disk bowl should be "bare metal" in the area of the imprints made by the hole (Figure 3)
LI46.80-P-0780432024-09-25. 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 NOTE: If hardware and software numbers do not match exactly what is listed below, please follow DTC guided tests. Old Hardware: A 290 460 3300 / 3400 > SW A 290 902 7400 Caution! This hardware cannot be flashed with the new software 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.
V-SC-20200900042020-11-16. Service bulletin. Chassis 3.88t
LI41.10-N-0689682020-10-19. Service bulletin. Noise on propeller shaft/rear axle from approx. 25 mph
Initial NCU - Le2020-09-28. Service bulletin. Install Leaf Spring Shims