Mercedes-Benz Recall 21V-527: Air bags – side impact

The problem

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.

The risk

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

The fix

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.

Recall details

NHTSA campaign	21V-527 (21V527000)
Manufacturer number	2021070032/33
Manufacturer	Mercedes-Benz USA, LLC
Component	Air bags › Sensor › Side impact
Report date	July 12, 2021
Owners notified	September 3, 2021
Vehicles affected	542
Initiated by	Manufacturer

Vehicles covered

Owner complaints about the air bags

Frequently asked questions

Is the recall 21V-527 repair free?

Yes. Mercedes-Benz dealers will fix the problem at no cost: 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.

How do I know if my car is included?

Not every vehicle of the listed model years is affected — the recall covers 542 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.

Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.