Image available on the official notice.
Passenger cars (Mercedes-Benz S400d 4MATIC, S500 4MATIC) - Repair
Official notice
30 Jun 2022
Last checked
27 Oct 2026
An official CAA Japan notice concerns Passenger cars (Mercedes-Benz S400d 4MATIC, S500 4MATIC) - Repair. Electrical equipment (rear signal acquisition and actuation module control unit) defect. ■ Defective component: Electrical equipment (rear signal acquisition and actuation module control unit). ■ Condition of the structure, equipment, or performance deemed noncompliant with standards and its cause: Due to an inappropriate design of the rear SAM (signal acquisition and actuation module) control unit software, the rear SAM may be incorrectly initialized when the engine starts, illuminating warning lights for associated units and restricting functions, such as preventing the rear door power windows from operating. In the worst case, the tail lamp unit may not operate correctly, causing the rear lights to fail to illuminate. Published 2022-06-30.
What to do now
(Recall notification number) 外-3438 ■ Corrective measures: On all vehicles, rewrite the rear SAM control unit software with the corrective program.
Units affected
4,286
Recall number
外-3438
Official notice
2022-06-30
The hazard
The hazard
Electrical equipment (rear signal acquisition and actuation module control unit) defect. ■ Defective component: Electrical equipment (rear signal acquisition and actuation module control unit). ■ Condition of the structure, equipment, or performance deemed noncompliant with standards and its cause: Due to an inappropriate design of the rear SAM (signal acquisition and actuation module) control unit software, the rear SAM may be incorrectly initialized when the engine starts, illuminating warning lights for associated units and restricting functions, such as preventing the rear door power windows from operating. In the worst case, the tail lamp unit may not operate correctly, causing the rear lights to fail to illuminate.
How to check if you're affected
How to check if you're affected
Compare the product name and identifiers below with the item you own. Check the official notice for the affected products and next steps.
Recall Numbers
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Affected products
Product 1
Units affected
Hazard
Where it was sold
Where it was sold
Retailer information is not currently available in RecallScope. Check the official notice for distribution details.
Location 1
Affected area 1
Company & contacts
Company & contacts
Brand: Mercedes-Benz. Contact: メルセデス・ベンツ日本株式会社. Phone 0120-086-880.
Source & status
Source & status
Recall details
Recall details
Recall number
Event id
Units affected
Source tier
Documents, notices & source
See the official notice and source documents for full details.
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