Recall 21V526 affects 1,690 2020 Mercedes-Benz Glb 250 SUVs for excessive second-row outlet voltage. Repair is free at any franchised Mercedes-Benz dealer.
Mercedes-Benz is recalling 1,690 2020 Glb 250 vehicles because the second-row accessory power outlet has the wrong voltage converter socket and sends excessive voltage to connected devices. That excessive voltage can increase fire risk, and Mercedes-Benz dealers will complete the recall repair free of charge.
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What's wrong?
The accessory power outlet for the second row in the 2020 Mercedes-Benz Glb 250 uses a voltage converter to supply household-style power inside the vehicle. The U.S.-market setup is meant to use a 115V socket, so plugged-in devices receive the voltage they are designed to handle.
On affected vehicles, a 230V voltage converter socket was installed instead of the 115V socket intended for the U.S. market. That production error can send excessive voltage through the second-row outlet. The result depends on the device plugged into the socket, but an overloaded device can be damaged, overheat, or create a fire risk.
The warning sign is tied to the item plugged into the outlet. A connected device that does not work as intended is the sign Mercedes-Benz identified before a larger problem develops.
Who's affected?
| 2020 Mercedes-Benz Glb 250 | wiring |
|---|---|
| Units affected | 1,690 |
| Field incidents | NHTSA has logged no field incidents to date. |
Not every 2020 Mercedes-Benz Glb 250 SUV is on the list. Check your VIN to confirm whether your specific SUV is included.
What's the safety risk?
Excessive voltage through the accessory power outlet can make a connected device stop working as expected and increase the risk of a fire. If that happens, unplug the device and schedule the recall repair soon. Repair is free at any franchised Mercedes-Benz dealer.
What should I do?
- Check your VIN to confirm your 2020 Mercedes-Benz Glb 250 is included in this recall.
- Contact a franchised Mercedes-Benz dealer to schedule the free voltage-converter inspection and replacement if needed, which fixes excessive voltage at the second-row accessory power outlet.
- Bring the recall notice if Mercedes-Benz mailed one. If not, reference recall number 21V526 when you call.
- Avoid using the second-row accessory power outlet until the converter inspection or replacement is complete.
What happens at the repair
At the dealer, a Mercedes-Benz technician inspects the voltage converter tied to the second-row accessory power outlet and replaces the converter if inspection shows it is affected. Parts and labor are free under recall 21V526. Out-of-pocket repairs already paid are handled through the new vehicle warranty, not through a separate reimbursement program, because the involved vehicles remained covered by that warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| July 12, 2021 | NHTSA published the recall |
|---|---|
| July 16, 2021 | Dealer notification began |
| September 3, 2021 | Owner notification mailed |
| September 3, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V526?
Recall 21V526 covers 1,690 2020 Mercedes-Benz Glb 250 vehicles with a second-row accessory power outlet that has excessive voltage because of an incorrect voltage converter socket. Mercedes-Benz dealers will inspect and replace the voltage converter for free.
What should I do if my 2020 Mercedes-Benz Glb 250 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V526. If it is, contact a franchised Mercedes-Benz dealer to schedule the voltage converter inspection and replacement. Reference recall 21V526 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mercedes-Benz will inspect and replace the voltage converter as needed free of charge at any franchised Mercedes-Benz dealer.
What is the safety risk in recall 21V526?
The safety risk is fire. Excessive voltage through the second-row accessory power outlet can reach a connected device and increase the risk of a fire. The dealer repair addresses the incorrect voltage converter socket at no cost.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V526000 |
|---|---|
| Mercedes-Benz customer service | 1-800-367-6372 |
| NHTSA recall # | 21V526 |
| NHTSA recall # (full) | 21V526000 |
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 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →