Just to clear up any possible confusion, 'restart mode' doesn't mean manual restart, it means if you fix the problem (throttle, mixture, whatever) it should restart itself.
Do NOT attempt to manually restart the engine (turn the key) when the prop is still windmilling. Personally I wouldn't bother with a restart at all, I'd just land it, seems too much danger of getting distracted trying to restart it and getting yourself into worse trouble...
Do you have the hatches closed/locked on landing Tomo?