Up for sale is a used MAS control unit. This performs a variety of different functions, from emissions control to the fuel pump. Tested & functional. This unit should offer many more years of dependable service. Part number (0115457932) 011 545 79 32 / (05370045) 05 3700 45 My list shows this fits many Mercedes models. Check the part number off your original. List for this is over $1000.