Renault Megane II 1.5 dci: on-board electronics, steering wheel lock and power steering defective

Hello, after our MB 320 cdi got a motor damage we bought the day before yesterday a Megane II Built. 2004 1.5 dci. There was sometimes steering wheel lock defective in the speedometer, but that disappeared again. Since today onboard electronics and power steering is defective in the speedometer. Also the ABS, STOP, brake and ESP lamps light up. If you want to turn it off you have to press the button often. If you press the turn signal and the brake the flasher is racing. I have no idea now what to do with it. nn and in 3 weeks we want to go on vacation. Maybe someone has experience with it and can help.