RE 2007 Mini Cooper-S, US model.
Just replaced battery. Took about (2) hrs.
Most time was spent trying to remove cowling section.
Now, I could do entire job done in 45 minutes.
If anyone needs more info email me direct. email@example.com
At windshield, there is a flat (upper) seal fits tight against windshield, part of the cowl section covering battery.
Underneath, unseen, is a secondary, silicon (rope configuration) seal that runs full length bottom edge of windshield. Seal is held in place by a V-shaped ridge in Cowl, that forces silicon seal (up) against bottom edge of windshield. To release, cowl has to be first pushed down to release that seal, then out and up.
Remove only (2) fasteners, passenger side of panel plus long molding (seal) that runs right to left side. Suggest placing 3/4 inch wood or soft item under wiper blade to provide needed clearance.
Take your time to avoid damage. Don't lower hood more than about 15 degrees when removing panel.