One other piece of trivia I remembered - if you want to upgrade the interior lighting to LED, only the dome lights are on the CANBus and need bulbs with resistor (I ended up buying BMW bulbs which are very nicely made but $$$). For the other lights - glove box, footwell, doors, trunk you can buy normal LED bulbs. I bought Philips (nicely made too) from Rockauto for around $5 a pop.