One problem related to manifold/header/muffler/tail pipe has been reported for the 2006 Mercedes Benz ML63. The most recently reported issues are listed below.
While driving, the check engine light came on and the vehicle started making a rocking mothin, did not know waht was going on and so I stopped vehicle on the shoulder. I checked the gas tank to see if there was a problem with the cover. Went back in the vehicle and tried to retart, vehicle would not start. I called the tow truck and had the vehicle towed to the dealer. Spent $576. For diagnosis and was initially told that the cylinder head was bent and the intake manifold had a problem. I was told me that I may need a new engine. I was told that it will cost $5600 to fix the problem after I complained to the corporate office then I was told that it would be $4300. Ii still do not have my car up to now because I was made aware that car needs a new engine. My car only has 84,000 miles. Very very upset with mb.