000 589 02 22 00 Test card - WS82.00-P-0024B
MODEL 117, 156, 166, 172, 176, 207, 212, 218, 242, 246, 292
Use in FG 82/Set B
Purpose:
For checking the SD card connection, the line connection as well as the navigation mode in the Audio 20 system.
Courtesy of MERCEDES-BENZ USA