thanks a lot for your Replies.
I am Using the Original w201 Speedometer the 4 Cylinder Tacho. is it Simply Connecting the Green/black Wire Behind the Stereo to the Pin No. 8 On the ECU?
what about the Green / Yellow wire ... the VSS Wire?
I Don't Know much About the Electrics of cars and all what I am Talking about is Purely off the Internet.so Bare with Me.