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Vehicle recall 21V527000 · July 12, 2021

Mercedes-Benz AMG G63, GLC 300 and 11 more models

The side crash sensor connectors may come loose, which could delay the activation of air bags and seatbelts during a side impact crash.

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

Summary
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.
Consequence
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.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Recall details

NHTSA campaign
21V527000
Reported to NHTSA
July 12, 2021
Filed by
Mercedes-Benz USA, LLC
Manufacturer campaign
2021070032/33
Owner notification
September 3, 2021
Vehicles potentially affected
542
Initiated by
the manufacturer
Components
Air bags › Sensor › Side impact
Recall 21V527000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

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