65 99 ... Test Mode for BMW Car Radio (Bavaria C Reverse RDS)

"BAVARIA C Reverse RDS" radios contain a test mode, with which various types of internal information can be displayed and various operating conditions set.

Starting Test Mode: 

Press keys "2" and "5" simultaneously while switching the radio on. A capital "S" appears in the display.

This service mode is abandoned by switching the radio on and off once.

Fig 1: Identifying Radio Display Button

Courtesy of BMW OF NORTH AMERICA, INC.

Changing Increase In Volume When Traffic Information Is Broadcast: 

Press the "TP" button for approx. 4 seconds until a "0" appears in the display. The station will be a little louder. With search run button, volume can be raised in 5 steps.

The factory setting is "0".

The regulating range amounts to +/- 6,25 dB

This mode is abandoned by pressing "TP" key again. The test mode remains activated.

Adjusting The Roadspeed-Dependent Volume (GAL): 

Press station button "3" for approx. 4 seconds until a "2" appears in the display. This value can be changed by using the automatic tuning rocker.

The factory setting is "2".

Regulation range:

"1": weak increase.

"2": medium increase.

"3": strong increase.

This mode is abandoned by pressing the "3" key again. The test mode remains activated.

Fig 2: Identifying Radio Display Button

Courtesy of BMW OF NORTH AMERICA, INC.

Changing From "distance" To "local" In Italy Mode: 

Press toggle switch "a*m" for approx. 4 seconds until an "H" or "L" appears in the display. This setting can be changed by using the automatic tuning rocker.

The factory setting is "H".

Regulation range:

"H": distance.

"L": local.

This mode is abandoned by pressing the "a*m" key again. The test mode remains activated.

Adjusting Viewing Angle for Display:

The angle of view can be changed by pressing the "RDS" key (E-31).

Factory setting: dark display with direct view.