had the same problem of speedometer not working, steering hard to turn and ELECTRONICAL FAULT message appearing with STOP one on my megane 2 2005.somethimes after starting the car the message STEERING CHECK would appear then quickly get replaced by the electronical fault one. followed of advice I got from one of the people here.here and its working now. I JUST changed the ABS fuse (10A) found on the passenger seat dashboard compartment on my car. other cars its under the steering wheel. everything working now. no ELECTRONICAL FALT, STOP and STEERING CHECK messages. steering soft and everything back to normal. word ofadvice: please check the fuses first before anything else for these cars.
pablo
October 2015