Thanks for the replies. I gave up on the car and sent it to the dealer. I actually had to have it towed because it would not move under its own power. I talked to the dealer today. They're not sure what is wrong with it but said that they have to replece the plugs and wires to rule them out as a problem.

I guess I cannot complain, this is the first repair that I had to pay for. I know that others have had issues with their ML's but ours has been a good car so far. When I hear what the solution was, I will post it here so that others here may benefit in the future.