Thread: w203 c class how to fit a pioneer avic hd1bt

hello everybody, i have a mercedes c class w203 2002 i have a audio 10 headunit with the mini iso, i am wanting to fit a pioneer avic hd1bt double din, has anybody fitted this, have tried useing a connect 2 harness with a patch lead and i connected the speed pulse and the reverse wires and it did not work nor did the steering wheel controls, could someone HELP as my satnav wont work could do with the speed pulse and illumination park brake, reverse wire to connect to my avic,
thanks inadvance for all your help