alright guys,

a friend of mine who owns a c220 mercs, had a flat battery,so off to the main stealersto purchasebrand new oem battery,
swapped the batteries over, the battery terminals could not have been off for more than a minute, likethe owners manualsays, connect positive termainl first and than the negative, but now the the washers, wipers dont work, nor do the the indicators and the hazard light switch, and lastly the remote key fob does not lock or open the doors,

first thing i thought was i blew a fuse, checked, and doubled checked the fuses in the engine compartment also inside the car and in the boot, i am completly lost, what have i done wrong, please help... thanks