One problem related to engine stall has been reported for the 2012 Mercedes Benz R350. The most recently reported issues are listed below.
The contact owns a 2012 Mercedes Benz e350. The contact stated that the engine stalled without warning. The vehicle was taken to the dealer, who performed a diagnostic that detected sludge in the engine. The engine was replaced however, the failure was not corrected and the vehicle continued to sporadically stall. The vehicle was taken back to the dealer for further inspection. The manufacturer was made aware of the failure. The approximate failure and current mileage was 34,000.