BMW ETK, TIS and Electrical Troubleshooting Manual on CDROM for all BMW models. These are getting harder and harder to find. The ETK helps greatly when trying to identify small parts or trying to figure how things go together as well as show what parts fit each model of BMW. You can look up the part that you need at home and then call the BMW to price the items. Shows all items by VIN NUMBER or model NUMBER. SPECIFIC. The Technical Information System is great for giving all technical data on repairing the vehicle as well as the symptoms leading to troubleshooting and repair. The Electrical troubleshooting CDROMíS show electrical component diagnostics and schematics wiring diagrams. A must have collection for that home do it yourself mechanic. If interested please contact me direct at the email above.