The maximum permissible operating temperature of individual diodes on the alternator rectifier bridge could be exceeded and the diodes could subsequently fail. Consequently, an improper flow of current from the on-board electrical system battery through the alternator to the vehicle earth could occur.
As a result, the windings in the alternator stator could be heated to such an extent that an outbreak of fire cannot be ruled out.
The Mercedes-Benz C-Class models affected by this recall were equipped with a four-cylinder petrol engine and manufactured between 1 March 2014 and 28 February 2018.
Mercedes recall code: 5499723
Affected models: C-Class BR 205
Vehicle numbers (worldwide): 270 754
Source: Rapex Alert 10/2021 A12/00323/21