scarleface93

I have an ML320, 2001 model. the light on the dash board come on while driving, then their is this beeping noise, the car will then lose speed, refusing to go into gear. I just bought this car not more than four month ago, I am lost, not knowing what to do. please I need answers, to know what is wrong because my garage, dont seem to know what the faulty is. so I wait for answer from anyone who knows about this problem. thanks.