I am just about to leave my M3W in winter storage in France, as I go back to the UK next Tuesday, until spring. I know all the other vehicles in this storage are either on trickle chargers for the modern ones with computers/coded radios etc but all the older cars have master switches for safety. I am a firm believer in master switches but my question is about volatile memory on both the fuel injection and display. If the battery is disconnected for any period (will be around 6 months) are any FI settings going to be permanently cleared and need reloading/programming and will the readings (kilometrage) on the dash display be lost? The master switch below is the one I am proposing to fit.
