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Campaign 21V230 Posted April 1, 2021 8,634 units

2021 Mercedes-Benz C, E, GLC Recall 21V230: Seat Switch

RN
Reviewed by the RecallNotify editorial team
Published May 23, 2026

Recall 21V230 covers 8,634 2021 Mercedes-Benz vehicles with faulty seat position switches. Repair is free at any franchised Mercedes-Benz dealer.

Mercedes-Benz is recalling 8,634 2021 C 300, E 350, and G 550 vehicles because a faulty electrical contact in the seat position switch can keep air bags and seat belt force limiters from activating properly during a crash. That raises the risk of injury, and Mercedes-Benz dealers will complete the recall repair free of charge.

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What's wrong?

On these 2021 Mercedes-Benz vehicles, the Hall sensor is part of the seat position switch. The switch tells the restraint system where the front seat is positioned, so the system can time the driver and passenger air bags and the seat belt force limiters. Force limiters help manage belt pressure on an occupant during a crash.

The problem is inside the switch. A supplier production deviation left a batch of switches with soldering connections that do not meet the required standard. That faulty electrical contact can interrupt the seat position signal, which can keep the air bags and seat belt force limiters from activating as designed during a crash.

Owners can see an SRS warning message in the instrument cluster. That is the warning sign tied to this defect, and it means the supplemental restraint system needs dealer attention.

Who's affected?

Includes coupe, sedan, SUV, and G-Class models, with the Hall Sensor tied to the seat assembly, seat belt, and air bag system.

2021 Mercedes-Benz AMG C63 S seat assembly
2021 Mercedes-Benz Cls 450 seat belt
2021 Mercedes-Benz AMG C63 S seat belt
2021 Mercedes-Benz AMG C63 S air bag system
2021 Mercedes-Benz Cls 450 seat assembly
Units affected8,634
Field incidentsNHTSA has logged no field incidents to date.

The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific vehicle is included.

What's the safety risk?

If the seat position switches are faulty, air bags and seat belts can fail to perform properly in a crash, increasing the risk of injury. An SRS warning message in the instrument cluster is the warning sign to take seriously. Contact a Mercedes-Benz dealer and schedule the recall repair soon. Repair is free at any franchised Mercedes-Benz dealer.

What should I do?

  1. Check your VIN to confirm your 2021 Mercedes-Benz model is included in this recall.
  2. Contact a franchised Mercedes-Benz dealer to schedule the free seat position switch replacement that restores proper air bag and seat belt force limiter activation in a crash.
  3. Bring the recall notice if Mercedes-Benz mailed one. If not, reference recall number 21V230 when you call.
  4. Call Mercedes-Benz customer service at 1-800-367-6372 if the dealer cannot confirm the repair path.

What happens at the repair

At the dealer, a Mercedes-Benz technician replaces the seat position switches covered by the recall. The repair is free, including parts and labor. The work addresses the faulty electrical contact inside the switch so the air bag system and seat belt force limiters receive the correct seat position information during a crash. Out-of-pocket repairs already paid are handled through the new vehicle warranty, not through a separate reimbursement program, because the involved vehicles remain covered under that warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.

ReimbursementWarranty coverage applies

Timeline

April 1, 2021 NHTSA published the recall
April 9, 2021 Dealer notification began
May 21, 2021 Owner notification mailed
May 31, 2021 VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle.
May 31, 2021 Interim owner notification (was planned for this date)

Frequently asked questions

What is recall 21V230?

Recall 21V230 covers 8,634 2021 Mercedes-Benz vehicles with faulty electrical contact inside the seat position switch. In a crash, the driver or passenger air bags and seat belt force limiters can fail to activate correctly, increasing injury risk. Mercedes-Benz dealers replace the seat position switches for free.

What should I do if my 2021 Mercedes-Benz vehicle is on this recall?

Check your VIN to confirm your specific vehicle is included in recall 21V230. If it is, contact a franchised Mercedes-Benz dealer to schedule the seat position switch replacement. Reference recall number 21V230 or Mercedes-Benz recall number 2021040016 when you call.

Is the recall repair free?

Yes. Federal recall law requires the manufacturer to repair this defect at no cost, and Mercedes-Benz dealers replace the affected seat position switches free of charge. Parts and labor are covered at any franchised Mercedes-Benz dealer.

What is the safety risk?

The safety risk is reduced crash protection. A faulty seat position switch electrical contact can keep the air bags and seat belt force limiters from activating properly during a crash, increasing the risk of injury. The dealer fix is to replace the seat position switches.

What if I bought this Mercedes-Benz used?

The free recall repair still applies. Federal recall law follows the vehicle, not the first owner. If you never received the owner letter Mercedes-Benz mailed on May 21, 2021, check your VIN and call a franchised Mercedes-Benz dealer with recall number 21V230.

More information

NHTSA campaign pagenhtsa.gov/vehicle-recalls/21V230000
Mercedes-Benz customer service1-800-367-6372
NHTSA recall #21V230
NHTSA recall # (full)21V230000

Source documents

This article is generated from NHTSA's primary recall filings and reviewed against the source on May 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →