diff --git a/Inc/config.h b/Inc/config.h
index dfe17d2f..ed3a3764 100644
--- a/Inc/config.h
+++ b/Inc/config.h
@@ -60,8 +60,8 @@
 
 // ###### CONTROL VIA RC REMOTE ######
 // left sensor board cable. Channel 1: steering, Channel 2: speed. Use a very short cable!
-//#define CONTROL_PPM                 // use PPM-Sum as input. disable CONTROL_SERIAL_USART2!
-//#define PPM_NUM_CHANNELS 6          // total number of PPM channels to receive, even if they are not used.
+#define CONTROL_PPM                 // use PPM-Sum as input. disable CONTROL_SERIAL_USART2!
+#define PPM_NUM_CHANNELS  4         // total number of PPM channels to receive, even if they are not used.
 
 // ###### CONTROL VIA TWO POTENTIOMETERS ######
 // ADC-calibration to cover the full poti-range: connect potis to left sensor board cable (0 to 3.3V) (do NOT use the red 15V wire in the cable!). see <How to calibrate>. turn the potis to minimum position, write value 1 to ADC1_MIN and value 2 to ADC2_MIN. turn to maximum position and repeat it for ADC?_MAX. make, flash and test it.
@@ -77,7 +77,7 @@
 
 // ###### MOTOR TEST MODE ######
 // slowly move both wheels forward and backward, ignoring all inputs
-#define CONTROL_MOTOR_TEST
+//#define CONTROL_MOTOR_TEST
 #define CONTROL_MOTOR_TEST_MAX_SPEED 300         // sweep slowly from -MAX_SPEED to MAX_SPEED (0 - 1000)
 
 // ############################### DRIVING BEHAVIOR ###############################