I am having problems connecting my Star Diagnotics to my 1998 Mercedes E Class (W210.025).

I have been using the 38-pin cable. I specify the VIN and that it is a post 3/97 build with DAS3. It is having trouble communicating with every module. I can't read anything - from the Tranny/Engine to the Instrument Panel or Climate Control.

The multiplexer was tested out on my 2004 CLK 320 Cabriolet and works well.

1) I am using the 38 pin connector and not the obd-ii connector. Is this correct?
2) I am connecting up and then loading Xentry DAS.
3) My battery voltage is 12.9 when the car is on and not running. It's a new batter.

I once hooked up the battery reverse by mistake. I replaced a couple fuses, including that on the back of the stereo.

Is there anything I should check as it can't connect to run the tests on the control modules? I get to the menu that lists the control modules - but nothing.

Can anyone help? I need to reset the Tranny Codes as I replaced the Electrics board in the tranny.

This is the hardest car I have ever worked on - we don't seem to "get along".

Can any PLEASE PLEASE help?

Thanks,
Richard