Mercedes-Benz bulletin OTA-5497834
Mercedes-Benz filed this with NHTSA as a over-the-air update dated Aug 9, 2025, received Aug 23, 2025, about the electrical system. It names 2 model years (2025). A over-the-air update is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationIssue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the software for the Mobile Access Unit (“MAU�) control unit may not correspond to the current series production configuration. This OTA software update for the Digital Vehicle Key (“DVK�) function within the MAU will improve battery management by disconnecting the vehicle network when it is not required. In addition, the software update contains general improvements for system stability and DVK device compatibility. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| OTA-5497834 | Over-the-air update | Aug 9, 2025 | 11022098 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. Quote it at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2025 Mercedes-Benz AMG E 53 4MATIC+ Wagon.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz OTA-5497834 a recall?
No. A over-the-air update is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the OTA-5497834 repair free?
A over-the-air update is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does OTA-5497834 cover?
The manufacturer filed it against 2 model years: 2025 Mercedes-Benz E-Class, 2025 Mercedes-Benz AMG E 53 4MATIC+ Wagon. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.