DETROIT — Mercedes-Benz is recalling just over 30,000 CLS-Class cars in the U.S. because the LED tail lamps may not light properly on the sides, reported The Detroit News.

The recall covers certain 2015 CLS 400s, 2012 through 2015 CLS 550s, 2012 and 2013 CLS 63s and the 2014 and 2015 CLS 63P.

Mercedes says in documents filed with U.S. safety regulators that the malfunctioning lights could prevent other drivers from seeing the cars, increasing the risk of a crash.

The problem was discovered in December during a quality check at the factory. Dealers will update the lighting control software at no cost to the owners. Mercedes doesn’t have a schedule yet for when the repairs will take place.