I bought one of these setups a year ago with internal hard drive. It works beautifully and is a ridiculously good buy. None of these sellers mention it, but you also get the Electrical Troubleshooting Manuals (ETMs) for most models dating back to the early R129.

The previous poster makes good points but misses the fact that what is being discussed here is not simply a scanner -- it is a complete diagnostic system. The interface to the scanner is integrated with the troubleshooting procedures described in the software.

__________________
For Sale: many used R129 parts from a white '92, black interior. Send email if interested.