actually, my moms old olsmobile was perfectly drivable with the parking brake (i hope thats the same as an e-brake. im not a bloody european like most here ) on. one day we were out running errands and then all of a sudden we hear this sound like something is dragging on the road. we pull into a parking lot, set the parking brake and check it out. the muffler was dangling. jimmy rigged it till we got back home. little did we know was that the parking brake was still on the whole way home.