BEIJING, June 14 -- German carmaker Mercedes-Benz will recall 6,302 vehicles in Chinese mainland over defective hood locks, China's quality watchdog said Tuesday.

The affected vehicles are the imported Smart series, manufactured between May 12, 2015 and Oct. 2, 2015, the General Administration of Quality Supervision, Inspection and Quarantine said in a statement.

The automaker said the locking device may loose when moving at high speed, which could cause the vehicle's hood to open.

The recall will start from June 15 and the company will replace the defective parts free of charge.