I just recently got a 2010 Mercedes GLK350 for my birthday. Its been about a month now, and there is something wrong with the 4 wheel drive. my parents are out of the country right now, so i dont know exactly what to do. when i try to put the car into 4 wheel drive, it just jumps back into 2 wheel high or what ever it is. i need the 4 wheel drive to get out of my housing plan, so if anyone can help or has advice, its appreciated!