How do you replace the alternator on a 2000 Mercedes c230 kompressor?

First thing is to look at the bottom passenger side pulleys. These cars have a serpentine belt ( 1 belt for all pulles ). There is an Idler pulley that believe it or not bends when you try to loosen it off ... this tensioner will allow you to change the belt and alternator ... before you change the alternator get someone to look at it it could be just the Voltage Regulator 40 roughly to replace ( It is located on the back side of the Alternator ).