Hello,
I wonder if any of you could help me. I have a w203 MB C Class C270 CDI. I have fitted a in car pioneer system which also has SAT Nav. The unit is an Avic X1. I contacted Pioneer re attachment of the Speed Sensor wire for the unit. This was the reply.

For your year of Merc model 203:

3-way contra-connector (nr. 24 or 26) under fusebox in ECU-box position 3, if
equipped with a 3-way blue connector: position 3 black;
12 volt pulse,


Regards.
Customer Relations
PIONEER GB LIMITED

Unfortunetely there were unable to supply a Diagram.

I am looking for help to find this connection so I can connect the speed sensor. If any body can help I would be most obliged. As much direction as possible would be appreciated.

Thanks.