[hdfxrs]

Does anyone have a recommendation on the type of tool to purchase to read the diagnostic codes? I have a 1998 Audi A8 Quattro. Can it be done without a tool, such as thruogh the climate control system display? This is alluded to in an EBay posting. Also, can any features be changed, such as auto locking of doors at 15 mph.

 

[Laseron]

As far as I know, the OBD codes can only be read out through a VAG COM. Yuo can get these through several online Audi / VW sites. Another member here says to get a good one will cost ~ $400.00. As for reading out through the climate control, you can look at things like RPM etc... but no error codes.