As far as I know it's still ISO-9141, yet a modified stack. In ISO-9141 only the hardware layer and very few functions for OBD-II are described, i.e. exhaust meter reading.

To access on-board aggregates, you still need the STARDIAG software which is extremly expensive.

Greeetz, Thomas

 

As far as I know it's still ISO-9141, yet a modified stack. In ISO-9141 only the hardware layer and very few functions for OBD-II are described, i.e. exhaust meter reading.

To access on-board aggregates, you still need the STARDIAG software which is extremly expensive.

Greeetz, Thomas

There are several websites that offer hardware solutions:
- http://www.pocketlogger.com (*)
- http://www.digimoto.com (*)
- http://www.qcontinuum.org/obdgauge (*)
- http://www.autologicco.com/pocketline/pocketobdpro.shtm (*)
- http://www.autoenginuity.com (*)
- http://www.myscantool.com
- http://www.palmerperformance.com
- http://www.obd-2.com
(*) The output of the products from these websites can be displayed to a Pocket PC/Palm.

All the products in these websites are compatible with ISO 9141. So, you tell me that they are useless as I won't have access to data?? Note down that I only want to see the data, I don't want to modify them (for obvious reasons).

 

Thanos,

thank you for all the links. I will check these later.

So, you tell me that they are useless as I won't have access to data?? Note down that I only want to see the data, I don't want to modify them (for obvious reasons).

No, I'm sure, these solutions would do what you expect ... if you don't expect too much. These interfaces provide access to a limited range of data from the car's motor management, such as lamda probe threshold.

I have an OBD interface for my '05 Audi A4. The interface and the software (VAG-COM) supports OBD II as well. I can connect it to the OBD interface of my SLK and so I get these readings.

What I can't do is reading and modifying data of other modules. An example: Mercedes gives you many choices of setting up comfort functions, such as ambient illumination. You access this function via the multi-function steering wheel.

My Audi doesn't provide that feature. But via the OBD module, a very broad range of functions is available. Here's a link to give you an idea of what I mean http://en.openobd.org/audi/a4_8e.htm

These functions only will be provided by a software solution which access the modules by a proprietary protocol. As far as I know, Mercedes Benz doesn't disclose their own protocol. So if you want to modify some settings, you need a) an ISO-9141 OBD II interface and b) an appropriate software, say STARDIAG.

Greeetz, Thomas

 

After a little search I found this link http://obdclearinghouse.com/oemdb/, which shows the location of the OBD II port for all the vehicles that have such port. The location of the OBD II connector for the SLK R171 is this http://autocenter.weber.edu/OBD-CH/documents/newdocuments/mercedes_benz/slk/2005_mercedes_benz_slk350.jpg (according to the website). So, is it the actual location of the OBD II port?

In addition, through this link http://www.scantool.net/searchCV.html the ISO port type can be identified (for cars that have already been submitted).

Finally, this link http://www.obdii.com/connector.html has technical details about the OBD II connector.