It appears I have a bit of a serious issue - hope not but it may appear so! Whilst getting my car ready for the MOT and checking the relevant bulbs etc are working, I noticed that the rear fog was not working. I checked the bulb and it had blown (or was not working) and replaced it with a known good one. Fog light still not working and no 12v supply at the bulb holder. I removed the rear cover for better access and checked all connections - still nothing. Checked the fuse box and there was NO FUSE??? - (when I purchased the car it had just passed an MOT??? - dodgy!!!) Checked what the rating should be and found it should have been a 7,5amp fuse but I did not have any spares but I did have a 15amp fuse so for the purpose of getting the light to work I put this in. Immediately, I heard a relay clicking in and so I went to the back of the car and found the bulb was illuminated - cracked it or so I thought! With the bulb still lit, I replaced the rear panel but as I banged in the last plastic fastener the bulb went off?? I removed the panel again and the light was back on?? I played with all the connections within the rear panel and the bulb went off but I could not get the bulb lit again?? I went back to the front to turn off the fog light and check the fuse and very quickly noticed smoke coming from under the dash / steering wheel so I quickly turned off the ignition and checked the fog light fuse. It didn't appear hot?? I awaited for the smoke to clear and tried to start the car to check systems but the battery seemed to be flat. Charged the battery and started the car. All appeared to be ok however, when I turned the car off and went to lock it I noticed I couldn't? I cannot lock it with the key nor by pushing down on the drivers side locking button?? Also, with the key in my hand, the dash is showing (orange key warning light) that the key is still in the ignition along with the warning alarm?? None of the buttons on the key fob now work nor for opening the rear tailgate. I also noticed that the passenger N/S front door light was permanently illuminated now?? _ I have removed the bulb for the time being. The car appears to drive ok and I can only lock the car by using the key in the door method but I'm not sure the alarm is activating?? Car is a 2007/8 I-CTDI Tourer. Any ideas as to what is damaged??