BenzWorld Junior Member
Date registered: Sep 2009
Vehicle: Mercedes E220CDI st.car /2000
Location: Copenhagen, Denmark
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Sorry, that will not work for You.
First, the communication on the 38pin connector is bidirectional 0-5 volt signal, the RS232 serial port on PC is receive and transmit on separate pins, +/- 3-12 volt.
I have tried to build a simple converter for this, but never got the software to Work with it. I ended up buying a carsoft box on Ebay, with cables, box and software. The expense was well earned back, as older Mercers are susceptible for all kinds of Wear outs in cables, connector, vacuum tube hoses etc. Spareparts are on the other hand available at fairprices, as long as You know what to replace.