Mercedes-Benz Amg Cls53, Mercedes-Benz Amg E53, Mercedes-Benz Amg G63, Mercedes-Benz Amg Glc63, Mercedes-Benz Amg Gt43, Mercedes-Benz Amg Gt53, model years 2020 to 2021. Filed by Mercedes-Benz USA, LLC and reported to NHTSA on 12 July 2021. 542 vehicles potentially affected.
What the notice says 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 …
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: 2021070032/33. That is the number on the owner letter and on the dealer paperwork. 21V527 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 21V527 cover?
- Mercedes-Benz AMG CLS53, Mercedes-Benz AMG E53, Mercedes-Benz AMG G63, Mercedes-Benz AMG GLC63, Mercedes-Benz AMG GT43, Mercedes-Benz AMG GT53, Mercedes-Benz CLS 450, Mercedes-Benz E 350, model years 2020-2021.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.
- Is there a fix yet?
- Yes, and it is free. 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.
- 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 2021070032/33, 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 seatbelts that don't function as intended can increase the risk of injury during a crash.”
affected
in the notice
caught
| Campaign | 21V527 |
|---|---|
| Filed by | Mercedes-Benz USA, LLC |
| System at fault | Air Bags:Sensor:Side Impact |
| Reported to NHTSA | 12 July 2021 |
| Model years | 2020-2021 |
| Vehicles named | MERCEDES-BENZ AMG CLS53, MERCEDES-BENZ AMG E53, MERCEDES-BENZ AMG G63, MERCEDES-BENZ AMG GLC63, MERCEDES-BENZ AMG GT43, MERCEDES-BENZ AMG GT53, MERCEDES-BENZ CLS 450, MERCEDES-BENZ E 350, MERCEDES-BENZ E 450, MERCEDES-BENZ G 550, MERCEDES-BENZ GLC 300, MERCEDES-BENZ S 450, MERCEDES-BENZ S 560 |
What the notice says today
The consequence
Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.
The remedy
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.
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.
The models named here, across their whole recall history
- Mercedes-Benz AMG CLS53 recalls: 17 US campaigns
- Mercedes-Benz AMG E53 recalls: 25 US campaigns
- Mercedes-Benz AMG G63 recalls: 18 US campaigns
- Mercedes-Benz AMG GLC63 recalls: 21 US campaigns
- Mercedes-Benz AMG GT43 recalls: 13 US campaigns
- Mercedes-Benz AMG GT53 recalls: 19 US campaigns
- Mercedes-Benz CLS 450 recalls: 21 US campaigns
- Mercedes-Benz E 350 recalls: 23 US campaigns
- Mercedes-Benz E 450 recalls: 34 US campaigns
- Mercedes-Benz G 550 recalls: 19 US campaigns
- Mercedes-Benz GLC 300 recalls: 46 US campaigns
- Mercedes-Benz S 450 recalls: 14 US campaigns
- Mercedes-Benz S 560 recalls: 4 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 21V527, wording as read on 16 September 2026. https://carsmultiverse.com/recall/21v527/
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 21V527 on 23 August 2026, they were:
- Defect summary
7afd8526 - Consequence
8e6996a4 - Remedy
716828f4
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 21V527 · how the whole register is watched
This notice names one vehicle among several registers that have written about it. Every notice this site holds for the Mercedes-Benz AMG CLS53, in all seven, is kept on that vehicle's own page, with the newest in each.
Put this notice on your site
A small badge that links here and names the register's reference. It costs one line of HTML and needs no key.
The badge is free to use. It links to this page and nowhere else, and it never shows advertising.
Owners of these cars
No register publishes what happens after the letter. Owners do: tell us, in two taps.
Anonymous: no account, no cookie, nothing you type is stored beyond these choices. Figures appear once 3 owners have answered, and are published with the record under CC BY 4.0.