MK4 rain sensor and auto dim rear view mirror retrofit harness. Wires that need to be added into the windshield wiper relay are pre terminated to plug right into the relay connector and ring terminal goes to any body ground. Only need to splice into a switched ignition source and optional reverse gear signal (if wanting the mirror to undim when backing up, black/blue tracer wire near hood release handle).
Need to add a 192 wiper relay and replace windshield for one with a rain sensor mount.