New Battery keeps dying and Boot issue 118i

Help Again. LOL

So stangely the battery on the 118i keep dying, ok i havent been driving it regularly but after parking for 2 or more days, its dies? Whats the correct size battery required for the 118i?

Further more, i have strange issue where the boot opens and locks whilst driving , however when i lock if parked off, its fine.

Any body can recommend any good auto electricians in JHB North?

cool, great weekend to all.