Please use a bumper button or ANY OTHER unused button to separate the engine start/stop action from the accelerator (right trigger) especially now that you upped the power of the M3S trucks (they also need a 5th gear now).

It is extremely annoying when trying to get into tight places with the truck and you want to move slow but feathering/tapping the the throttle and then the truck shuts off..

I don't know why the same button is used for both actions, but your real life care isn't turned on and off by the accelerator pedal now, is it?