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MODEL-YEAR RECALL REPORT

2021 Mercedes-Benz Cls 450 recalls

NHTSA's September 21, 2026 snapshot lists 8 safety recall campaigns for the 2021 Mercedes-Benz Cls 450, spanning 6 component groups. A model match does not confirm that a specific VIN is included.

Official source: NHTSA recall campaign file · Snapshot September 21, 2026

Distinct campaigns8not VIN-specific
Component groups6distinct top-level categories
Latest recordFebruary 9, 2024report received
VIN resultNot checkeduse official lookup

01 / OFFICIAL CAMPAIGNS

2021 Mercedes-Benz Cls 450 recall campaigns

The 2021 Mercedes-Benz Cls 450 report contains 8 distinct NHTSA campaigns; the most recently received record is campaign 24V100000 dated February 9, 2024.
Component
ELECTRICAL SYSTEM
Report received
February 9, 2024
Potential units
12,191campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 CLS450, E450, E450 All-Terrain, AMG E53, AMG GT43, AMG GT53, and 2021 AMG CLS53 vehicles. The 48-volt ground cable connection located in the engine compartment may not be tightened properly and may result in the ground cable overheating.

Why it matters: An overheated ground cable increases the risk of a fire.

Remedy

Dealers will inspect the 48-volt ground cable connection and repair it as necessary, free of charge. Owner notification letters were mailed March 22, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024MMNNNN.

Owner notification: March 22, 2024 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
ELECTRICAL SYSTEM
Report received
September 30, 2022
Potential units
19,968campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2022 CLS450 Coupe and AMG E53, 2019-2021 AMG CLS53 Coupe, and 2021-2022 E450 vehicles. The 12-Volt battery in the trunk may not be properly secured, which, in the event of a crash, can cause electrical connection failure, disabling various safety features including, emergency call (eCall) system, electric seat adjustment, hazard warning lights, and automatic door locks.

Why it matters: The inability to operate safety features (eCall system, hazard lights, electric seats, or automatic door locks) can increase the risk of injury during a crash.

Remedy

Dealers will secure the 12V battery, free of charge. Owner notification letters were mailed January 20, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022100009.

Owner notification: January 20, 2023 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
COMMUNICATION, ELECTRICAL SYSTEM
Report received
May 20, 2022
Potential units
242,722campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.

Why it matters: A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.

Remedy

The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.

Owner notification: July 8, 2022 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
AIR BAGS
Report received
July 12, 2021
Potential units
542campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 CLS450, AMG E53, AMG CLS53, E350, E450, AMG GT43, AMG GT53, 2020 S450, S560, G550, AMG GLC63, 2020-2021 GLC300, and AMG G63 vehicles. The side crash sensor connectors may come loose, which could delay the activation of air bags and seatbelts during a side impact crash.

Why it matters: Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.

Remedy

Dealers will inspect and replace as necessary, the side impact crash sensors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021070032/33.

Owner notification: September 3, 2021 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
SEAT BELTS
Report received
June 25, 2021
Potential units
4,917campaign-wide
Defect and consequence

Defect: Mercedes-Benz, LLC (MBUSA) is recalling certain 2021 G550, AMG G63, E350, E450, AMG CLS53, AMG E53, AMG GT43, AMG GT53, AMG GT63, 2021-2022 CLS450, and AMG E63 vehicles. The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection.".

Why it matters: An unsecured child restraint system can increase the risk of injury during a crash.

Remedy

Dealers will inspect, and replace as necessary, the rear seat belt assemblies, free of charge. Owners notified of the voluntary recall campaign by an interim letter on August 13, 2021. A final letter was mailed on September 24, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.

Owner notification: September 24, 2021 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
BACK OVER PREVENTION, ELECTRICAL SYSTEM
Report received
May 14, 2021
Potential units
343,191campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The MBUX multimedia system software may cause the display to remain black, or reboot after startup. This could result in the rearview camera image not displaying properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility.".

Why it matters: A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.

Remedy

The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021. Owners may contact MBUSA customer service at 1-800-367-6373. MBUSA's number for this recall is 2021050012.

Owner notification: June 28, 2021 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
AIR BAGS, SEAT BELTS, SEATS
Report received
April 1, 2021
Potential units
8,634campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C-Class, E-Class, E-Class Coupe and Convertible, GLC, CLS, AMG GT 4-door Coupe and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. A faulty electrical contact within the seat position switch may prevent the driver and passenger air bags and seat belt force limiters from properly activating during a crash.

Why it matters: Air bags and seat belts that do not perform properly in a crash can increase the risk of injury.

Remedy

MBUSA will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040016.

Owner notification: May 21, 2021 · Filing manufacturer: Mercedes-Benz USA, LLC

Component
COMMUNICATION, ELECTRICAL SYSTEM
Report received
February 5, 2021
Potential units
1,292,258campaign-wide
Defect and consequence

Defect: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.

Why it matters: Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.

Remedy

MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.

Owner notification: March 12, 2021 · Filing manufacturer: Mercedes-Benz USA, LLC

02 / COMPONENT BREADTH

What defects are listed for the 2021 Mercedes-Benz Cls 450?

The most frequent component groups in 2021 Mercedes-Benz Cls 450 campaign records are Electrical System (5), Communication (2), Air Bags (2), Seat Belts (2), Seats (1); these counts describe filed campaigns rather than observed failure rates.
Electrical System5
Communication2
Air Bags2
Seat Belts2
Seats1

03 / MODEL-YEAR CONTEXT

How the 2021 Mercedes-Benz Cls 450 compares across model years

RecallRoad publishes 5 model-year reports for the Mercedes-Benz Cls 450, spanning 2019–2023; each year keeps its NHTSA campaign count separate.
Open the complete Mercedes-Benz Cls 450 model history →