It happens that the 2CV has to be started repeatedly to get the engine to work at all. This is the case, for example, when adjusting the contact or carburetor. If you then tinker with the 2CV, you will definitely have oily hands and use them to lubricate the door handle, the ignition key and the choke lever. Apart from that, the duck always goes out if you want to close the door and go to the engine. I came up with something very simple. Take a switch to test the brake fluid indicator light with two connected cables, about 30 cm long.

Put two crocodile clamps on it and that's all. One pole is connected to the plus on the battery, the other terminal to the thinner cable of the starter, the magnetic switch. Make sure all connections are insulated, otherwise you will get sparks. If you press the button now, you will do nothing but turn the ignition key without turning it. You can accelerate directly on the carburetor on the throttle and also the choke. Turn on the ignition, do not forget to pull out of gear and put on the handbrake. So you can start the engine and at the same time make any changes to the adjustment of the carburetor or the contact. If you are using a switch from another manufacturer, make sure that it is a button that interrupts contact immediately when it is released.