Engine stop-start technology is great for saving some fuel in urban driving, but its success is predicted on it restarting a car’s engine promptly when necessary. In the case of the 2016 Mercedes-Benz GLE450 AMG Coupe, defective software means only half of the stop-start equation actually works.

The GLE Coupe is subject to a new recall because a defect with its engine-management software could cause the engine to shut off unexpectedly when the driver is braking to a stop. While the driver might assume that’s due to the stop-start system functioning, Mercedes told the National Highway Traffic Safety Administration, the engine won’t restart when the driver takes his or her foot off the brake. That could result in an accident if the car is stalled at, say, a busy intersection.

Mercedes says the recall affects 5,826 vehicles in the U.S. They will be recalled and repaired for free; the update is as simple as upgrading the car’s software.

Source: NHTSA

Gallery: 2016 Mercedes-Benz GLE450 AMG Coupe recalled for engines that can shut down

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Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2016 GLE450 AMG 4Matic Coupe vehicles manufactured December 10, 2014, to June 6, 2016. An error within the engine control unit (ECU) software may allow the engine to shut-down while the vehicle is braking, possibly confusing the driver into thinking the shut-down was planned due to the ECO start/stop function.

If the engine shuts down unintentionally, there may be an increased risk of a crash.

MBUSA will notify owners, and dealers will update the ECU software, free of charge. The recall is expected to begin in July 2016. Owners may contact MBUSA customer service at 1-800-367-6372.