Recall 21V034 covers 231 2021 A 220, Cla 250, and AMG A35 vehicles for a missing ISOFIX anchor bar. Free repair at Mercedes-Benz dealers.
Mercedes-Benz is recalling 231 2021 A 220, Cla 250, and AMG A35 vehicles because the ISOFIX child-seat anchor on the right-rear seat can be missing its right-side anchoring bar. If that bar is missing, a child restraint cannot be secured properly with ISOFIX, and the Mercedes-Benz dealer repair will be free once available.
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What's wrong?
The ISOFIX bracket in these 2021 Mercedes-Benz A 220, Cla 250, and AMG A35 vehicles is the metal anchor bracket built into the rear seat for a compatible child restraint. It gives the child seat fixed lower anchor points so the restraint can be clipped to the vehicle seat, instead of relying only on seat-belt routing.
On affected vehicles, the right-rear seat ISOFIX bracket was built from a supplier batch that did not meet Mercedes-Benz production specifications. The right-side anchoring bar can be missing from that bracket. Without that bar, the child restraint cannot attach to both lower anchor points on that seating position as described in the owner's manual.
An owner can spot the issue by looking at the right-rear ISOFIX bracket before installing a child seat. The clearer warning sign is during installation: the child restraint attaches on one side of the seat, but not both sides.
Who's affected?
Mercedes-Benz lists the same ISOFIX bracket issue across A 220, Cla 250, and AMG A35 cars, with child seat and vehicle latch anchor components both named.
| 2021 Mercedes-Benz A 220 | Vehicle latch anchor |
|---|---|
| 2021 Mercedes-Benz A 220 | Child seat |
| 2021 Mercedes-Benz Cla 250 | Vehicle latch anchor |
| 2021 Mercedes-Benz Cla 250 | Child seat |
| 2021 Mercedes-Benz AMG A35 | Vehicle latch anchor |
| 2021 Mercedes-Benz AMG A35 | Child seat |
| Units affected | 231 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific car.
What's the safety risk?
A missing ISOFIX anchoring bar means a child restraint in the affected right-rear seat cannot be secured correctly with the ISOFIX system, increasing injury risk for a child in that seat. Check whether the restraint attaches on both sides before using that seating position. Repair will be free at any franchised Mercedes-Benz dealer once available.
What should I do?
- Check your VIN to confirm your 2021 Mercedes-Benz A 220, Cla 250, or AMG A35 is included in this recall.
- Confirm Mercedes-Benz service instructions for your VIN before scheduling dealer work.
- Contact a franchised Mercedes-Benz dealer and ask about the right-rear ISOFIX bracket inspection for recall number 21V034.
- Bring the recall notice if Mercedes-Benz mailed one, or give the dealer recall number 21V034 when you call.
- Avoid using the right-rear ISOFIX child-seat anchor until the dealer confirms the bracket has the right-side anchoring bar or replaces the bracket.
What happens at the repair
At the dealer, a Mercedes-Benz technician inspects the ISOFIX bracket for the right rear seat and replaces the bracket when the right side anchoring bar is missing. The dealer repair will be free once available, with parts and labor covered by the recall. Out-of-pocket repairs already paid are handled through the new vehicle warranty, not through a separate reimbursement program, because the involved vehicles remained under warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| January 29, 2021 | NHTSA published the recall |
|---|---|
| February 5, 2021 | Dealer notification began |
| March 16, 2021 | Owner notification mailed |
| March 30, 2021 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| March 30, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V034?
Recall 21V034 covers 231 2021 Mercedes-Benz A 220, Cla 250, and AMG A35 vehicles with a right-rear ISOFIX child-seat anchor bracket that lacks the right-side anchoring bar. Mercedes-Benz dealers inspect the bracket and replace it for free when needed.
What should I do if my 2021 Mercedes-Benz A 220, Cla 250, or AMG A35 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V034. If it is, contact a franchised Mercedes-Benz dealer to schedule the right-rear ISOFIX bracket inspection. Reference recall number 21V034 or Mercedes-Benz recall number 2021020004 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair this safety defect at no cost. Mercedes-Benz dealers inspect the right-rear ISOFIX bracket and replace the bracket, if needed, free of charge.
What is the safety risk?
The safety risk is that a child restraint cannot be properly secured with the ISOFIX system if the anchoring bar is missing. That increases the risk of injury for a child seated there. Use the VIN check first, then ask the dealer for repair scheduling guidance.
When did Mercedes-Benz start this recall?
Mercedes-Benz began this recall on March 16, 2021. If you bought the vehicle used or never received a notice, the VIN still decides whether your 2021 A 220, Cla 250, or AMG A35 is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V034000 |
|---|---|
| Mercedes-Benz customer service | 1-800-367-6372 |
| NHTSA recall # | 21V034 |
| NHTSA recall # (full) | 21V034000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
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 →