Engine could shut off unexpectedly during braking.

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

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