My 2002 ml 320 went to the dealer.They claim the ignition switch,lock,and column need to be replaced.The steering wheel doesn't lock when the key is removed.The vehicle doesn't lock with key remote. https://speedtest.vet/ https://vidmate.bid/ https://wordtopdf.ltd/The vehilcle beeps when key is removed until door is closed.The dealer claims fault 15 at the switch?They want 2,000 for repairs.Can I change the switch and steering lock/cylinder easily or an I needing a steering column as well.Thanks