That is an E-gas control module. 44 32 is the wrong part for your car, it is for later cars, those after B840529. Your car is a B450176 so it should have part number 124 545 26 32. There is no 124 545 86 32 for a 500E - could be a misread or from another car. You may be able to send it to the U.S. to be rebuilt. But the 44 32 you are now using is just the wrong part.