thanks black and evoz, well the whole problem was that it was not even possible to open the doors, coz the central locking systems is also connected to the battery, have u noticed that the car only locks after a few seconds, well it doesn't use the same as a wira central lock gun where u can just turn the key and the lock will open, i guess it uses sum type of sensor or sumthin... so to open the door when the battery is dead, u would need to pull up the lever than turn the key.... learned it from a bmw owner!:stupid: that was the only way to open the lock... but the rest was rite... didn't need to do anything to the ecu... just drained out the old petrol and did an engine service...