Complex sentence: The Model S cars are built and tested in Fremont, California, and then, the battery pack, the electric motor and parts disassembled and shipped separately to Tilburg, where the cars are reassembled.
Split into simpler sentences: The Model S cars are built and tested in Fremont, California. Then the battery pack, the electric motor and parts are disassembled and shipped separately to Tilburg, where the cars are reassembled.