Mercedes-Benz Glb250, model year 2020. Filed by Mercedes-Benz USA, LLC and reported to NHTSA on 13 August 2021. 66 vehicles potentially affected.
What the notice says Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB250 vehicles. In the event of a crash, the air bag control unit software may not activate the front seat belts and front passenger air bag properly.
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
Mercedes-Benz's own number for this recall: 2021080019. That is the number on the owner letter and on the dealer paperwork. 21V639 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 21V639 cover?
- Mercedes-Benz GLB250, model year 2020.
- What is wrong with them?
- Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB250 vehicles. In the event of a crash, the air bag control unit software may not activate the front seat belts and front passenger air bag properly.
- What can happen if it is not put right?
- Air bags and seat belts that do not function properly can increase the risk of injury in a crash.
- Is there a fix yet?
- Yes, and it is free. Dealers will update the air bag control unit software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. Mercedes-Benz calls this recall 2021080019, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “Air bags and seat belts that do not function properly can increase the risk of injury in a crash.”
affected
in the notice
caught
| Campaign | 21V639 |
|---|---|
| Filed by | Mercedes-Benz USA, LLC |
| System at fault | Air Bags:Air Bag/Restraint Control Module:Software |
| Reported to NHTSA | 13 August 2021 |
| Model years | 2020-2020 |
| Vehicles named | MERCEDES-BENZ GLB250 |
What the notice says today
The consequence
Air bags and seat belts that do not function properly can increase the risk of injury in a crash.
The remedy
Dealers will update the air bag control unit software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 846 notices in the record whose component field names air bags. Across that group the median wait before owners were written to was 46 days.
Last checked . No change has been recorded in the wording.
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 21V639, wording as read on 16 September 2026. https://carsmultiverse.com/recall/21v639/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 21V639 on 23 August 2026, they were:
- Defect summary
f6e42d24 - Consequence
ba3080f5 - Remedy
b8c98ef8
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 21V639 · how the whole register is watched
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