when you want km change; Need to be connected in car for ever car.

1: change km on dashboard ,

2 : connected this module . if not use this, you make km correction of dash, after install the dash back to car, the km will come to original. to prevent the km come back to original such as, the original km is 1000km, you make 500 km , you put dash back to car, the km come back to 1000km, if not use this module

Function:

Filter the km synchronization command between the cluster and the EZS module . This is the only way for the correction of w221 and w164 new models.
 
W221 CAN FILTER (for 2006 model of S-class)