Changed the battery on my friends BMW it just took removing 5 parts/covers/crossbar, 16 bolts, 2 clips and the battery was ONLY 350$. German engineering at its finest!
Everyone told him not to buy it he did it anyway.
Oh, I almost forgot his gas pedal keeps unclipping from the bottom when there is a bit of sand or rocks on the carpet. Told him to press from the bottom instead of the top so it stays clipped but does he listen !