The disco won't start. its a 300 tdi, P reg. Power is getting to the starter motor but there's just a whirring noise. I don't think it's engaging. The electrics seem to be playing up a little (Alarm system). Can it be connected? I've also noticed a Heat/Burning smell latly. Smells something like over cooked brakes or clutch (mines an auto). Any info on a remedy. Thx Ian