Why is your key lock not working on your ml320?

The key lock on your ML320 may not be working due to a few common issues, such as a dead key fob battery, a malfunctioning lock mechanism, or a misalignment in the door latch. Additionally, dirt or debris in the lock cylinder can prevent it from turning smoothly. It's advisable to check the key fob battery first, then inspect the lock for any visible obstructions or damage. If the problem persists, consulting a professional locksmith or mechanic may be necessary.