In the event of an independent hardware failure, the lambda control in the Engine Control Unit (ECU) software can erroneously increase the amount of injected fuel during cylinder deactivation. As a result, exhaust temperatures can increase and this can damage surrounding components (e.g. engine wiring harness, catalytic converter). This can create an unexpected loss of propulsion, increasing the risk of accidents and injuries. Moreover, this can increase the risk of fire. In addition, local statutory exhaust emission limits could be exceeded.
The Mercedes-Benz S-Class vehicles affected by this recall were manufactured between 30 June 2020 and 19 September 2023.
Mercedes recall code: 5496234
Affected models: S-Class
Vehicle numbers (worldwide): 53,180
Source: Rapex Alert 50/2024 A12/03598/24