Quote:
   | Originally posted by Mr C 6 Cylinder BMWs have the battery in the Boot 4 Cylinders under the bonnet
 
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   and the 7 series has two batteries in the boot, one on either side, just to make it more exciting.
 Friend had problems with charge not being held and took a while to fathom out which battery was the dodgy one.
 Sounds very much like a poor earth/live strap and the final spark ignited the fumes.(?)