Took delivery of 2005 C240 4Matic on Monday. For some reason I had to disconnect the vehicle battery overnight. After reconnecting the battery in the morning, I discovered that the remote control is no longer locking or unlocking the doors. When I press the keys, the indicator light on the remote blinks but the lights on the car do not respond. I guess the remote needs to be reset or re-synchronized or whatever. How do I resolve this? Grateful for your suggestions.