Rowing 300 hot car is not easy to start, so it can only be started by throttle, or it can be started by turning off the switch first and then turning it on.

Hello friend, in this case, I suggest you go to the repair shop and ask the maintenance master to help you remove the intake branch pipe and clean up all the carbon deposits inside and on the intake valve. In addition, clean the fuel nozzle and throttle valve. This problem will be cured. Better check the spark plug gap again. If the gap is too large, replace the spark plug. I hope my answer can help you. Please feel free to contact me if you have any questions. BBA Mercedes-Benz BMW Audi Maintenance Center wishes you a happy life, all the best and rolling financial resources!