Hello again , and thanks for the replies , serpentine belt was removed for initial inspection , and timing chain ,tensioner and rails were all replaced with MB parts, perhaps your right I should just live with it , new car to me , just sad to hear that noise , also any hints as to why the power steering pump is not working , has fluid, was working when it was at my house now the MB mechanic says its not , don't trust him any more , so if you have hints i would appreciate it , thanks again Kane