89 vehicles could be at risk of stalling after the idle stop/start function is engaged.

Mercedes-Benz Australia has issued a recall for the 2018 and 2019 model-year A-Class, C-Class and CLS model lines over concerns a software issue could cause vehicles to stall in stop/start traffic.

The German luxury marque reports the software in the powertrain control unit "may not operate as intended", which may also fail to illuminate the engine warning light – meaning the driver is unaware of the issue.

If the condition occurs, a reset of the control unit may occur while the vehicle is in use, which could cause the engine to not restart when the idle stop/start function is engaged.

Furthermore, Mercedes-Benz says vehicles may experience a loss in power which will cause unexpected coasting while in motion. This poses a hazard to the vehicle's occupants and other road users.

A total of 89 units across all three model lines are affected by this recall, which were sold between 22 May 2018 and 4 February 2019 – the VIN list is available here.

Owners of the affected A-Class, C-Class and CLS models will be contacted directly by the company's local division, and are advised to arrange an appointment with their local dealer for repair.