Every 5000 km (3000 miles) or every three months, hinges and assembly locking latch doors, hood and trunk lid must be lubricated with a few drops of an oil, or a special lubricant for locks. Drummers locks to be smearing grease to reduce the rate of wear and guarantees reliability of operation. To lubricate the locking assembly is best to use a special graphite lubricant that comes in aerosol containers.