The instructions seem to have lost a bit in translation though, not sure I understand what the - button and red leds signify?
On the settings, there are 3 main program buttons PROG, so select that first. Then the other +/- leds are for adjusting the responsiveness of the program. The green led's are pluses + (from neutral centre point), the red led's are minus - from neutral centre. So whatever Program you choose - Sport, Sport+ or City, on the +/- lights display, 3 reds is the least aggressive setting, increasing through the range - 2 reds, 1 red, neutral 0, 1 green, 2 green to 3 greens which is the most aggressive setting. Avoid the most extreme setting of Sport+ and 3 green lights which can cause the car to go into LIMP mode, and I know someone who had theirs on this setting and that's what happened.
The sweet spot setting for me is Sport (amber light) and 2 green lights.