HI THERE I HAVE A E200 W210 THE KEY FOB HAS STOPPED WORKING IS THERE ANY THING I CAN DO THE ALARM WONT TURN OFF I HAVE CHANGED THE BATTERYS BUT STILL DOES NOT WORK IS THERE A WAY OF TURNING THE ALARM OFF

 

Check the remote first look into the red window of the remote press and hold the remote button for 3 sec. does a red led flash once. if not repair the remote, if the remote is operational, re syncronise it by pointing it toward the interior mirror press the remote button, then switch the ignition on. one of the conformation lights on the mirror should start too flash.
remote should function as normal