Mercedes A-class W168 DTC P0121 P1590 fix / repair

Easy tutorial for fixing the no start condition on petrol Mercedes W168 A-class types: A140, A160 or A190. Sudden engine stop, with crank no start symptoms, no MIL light, but battery light on. The fault is contained in the throttle body module and is caused by the flap control fail. Fix is easy, by changing the old part with a new / second hand working one. No programming is required. Tools needed: PH3 screw driver, torx T25 driver, throttle body cleaner spray, OBDII scanner - reader for reading and erasing the stored DTC's. Tutorial used for this particular DTC: * P0121-015 M16/6 (Throttle Valve Actuator): The Restoring Spring Of The Throttle Valve Is Faulty * P1590 Safety Fuel Shut-off Has Been Detected