Service bulletin LI 27.10-P-080851

Manufacturer communication, from NHTSA Manufacturer Communications

Published by NHTSA

Sep 9, 2026

Manufacturer

MERCEDES-BENZ

NHTSA ID

11037211

NHTSA category

Service Bulletin/Repair Instructions

Applies to, as stated by NHTSA

MERCEDES-BENZ A 220 2019-2022; MERCEDES-BENZ A 220 4MATIC 2019-2022; MERCEDES-BENZ AMG A35 2020-2021; MERCEDES-BENZ AMG A35 4MATIC 2020; MERCEDES-BENZ AMG CLA35 2020-2024; MERCEDES-BENZ AMG CLA35 4MATIC 2020, 2025; MERCEDES-BENZ AMG CLA45 2014-2023; MERCEDES-BENZ AMG CLA45 4MATIC 2020; MERCEDES-BENZ AMG CLA45S 4MATIC 2025; MERCEDES-BENZ AMG GLA 35 2024-2025; MERCEDES-BENZ AMG GLA 35 4MATIC 2024; MERCEDES-BENZ AMG GLA35 2021-2023; MERCEDES-BENZ AMG GLA45 2015-2023; MERCEDES-BENZ AMG GLB35 2021-2025; and 15 more models

Component, as stated by NHTSA

POWER TRAIN

Text of the manufacturer communication

Complaint Intermittent shift feel or thud/clunk noise perceived, such as a brief jerk or transmission reaction during certain driving situations. May be most noticeable when transitioning from a coasting condition to accelerator pedal application. May occur in all drive modes. Cause Dual‑clutch transmissions (DCT) inherently exhibit more dynamic shifting behavior compared to other types of transmissions. This is due to the use of physical clutches for starting and gear changes. In certain situations, dynamic driving behavior can lead to a slight jerk sensation which is a normal technical characteristic of the transmission. A typical example is a "Change of Mind" situation: • The customer is coasting towards a red traffic light. • The traffic light turns green while the vehicle is still coasting. • The customer then presses the accelerator pedal. In these situations, a slight jerk may occur briefly because the transmission must quickly engage the appropriate gear and control the clutches accordingly. Since shift forks are responsible for engaging the gears during shifting, a slight shifting noise may also be noticeable. Please note driving programs S, S+, and M are designed to provide sportier vehicle behavior and are not optimized primarily for maximum comfort, so this operation may be more audible. Remedy Verify the customer's concern and confirm proper transmission operation. If no faults or abnormal operating conditions are identified by IPR (Intelligent Predictive Repair), no hardware replacement is necessary. Inform the customer that the transmission has been designed to provide direct gear engagement and responsive vehicle performance. Under certain operating conditions, brief shift sensations may be perceptible and are consistent with the operating characteristics of the dual‑clutch transmission

Manufacturer document number

LI 27.10-P-080851

Date of the communication

2026-08-29

NHTSA reuses some ID numbers across record types. If its page lists more than one record, this one is the manufacturer communication dated Sep 9, 2026.