Mercedes-Benz C-Class E-Class GLC GLK Door Lock Switch Left 2049058402 / Right 2049058502

This door lock switch directly replaces OEM numbers 2049058402 (left) and 2049058502 (right). It is universally compatible and matches the car when installed. Its function is to control door lock opening and closing via interior switch or remote, ensuring correct lock response. Fits Mercedes-Benz C-Class, E-Class, GLC, and GLK models; left and right sides have corresponding models. If the original door lock switch ages, symptoms include unresponsive button, jammed locking, or intermittent failure; replacing with this restores smooth operation and prevents doors from not locking or not opening.