safe mode

Happy New Year everyone. My 2004 Eclass 320 CDI decided to go into safe mode, I think caused by me being stationary for some time and running it on tick over. Not sure what the problem could be, it seems to run okay just won’t rev out because it’s on safe mode anyone know how to get it off safe...

W203 2001 has a very peculiar problem, the key fob has started developing a problem and I am unable to unlock steering wheel and turn the ignition at times. When I do manage, the entire instrument cluster and the electrics stop working, like radio, indicators, electric windows, but the car runs...