One night I was in Reading about 21miles away from home driving the C320 and the regulator was gone but the car made sure it got me home till it actually died, it started shuting down the head lamps, command system, all the errors on the car's computer started poping up, but the car got me home safely, that was at about 11pm.
Thats why I love mercs if that was a BMW or even an Audi it would of let me down and left me by the side of the road!