My wifes A160 has been well and truly attacked by the gremlins . On a couple of recent (short ) journeys , the car has gone into limp mode , with the "f" (appropriate code) light on the dash. After stopping and restarting the car runs normally for a while , then does a repeat performance. Put an OBD2 meter on and came up with 2 codes ;- P0705 Transmission range sensor A circuit PRNDL input , and P0443 Evaporative emission system purge control valve circuit. Late last night the alarm went off . Rushed outside , could not open the car with the remote. Opened it with the key , disconnected the battery , alarm still blaring away . Obviously a backup battery in the alarm/immobiliser. Frantic few minutes trying to locate the whereabouts of the alarm , but could not find it. In the end i connected a battery charger and reset with the remote. Then discovered the auxiliary air injection pump was continuously running , presumably the cause of the battery running flat (in turn triggering the alarm?). This morning I rang an auto electician , only to be told "sorry mate , don`t have a programme for a 2001 model , too old , its a Mercedes only job". Short of blowing it up , any sensible suggestions please? Unfortunately my wife has limited mobility so is almost housebound without her car.