I just did this tonight. So EASY! The E90 trims literally come off with your bare hands. Only used a flat head screw driver to start the prying before I realized the wood trim/vent comes off if you pull it and the lighting trim comes off by just lightly pulling on it.
I did NOT pay $150 for the switch ECS Tuning sells. Just scour eBay on the international search and you will find lots of these BMW Euro Spec switches for under $50.
Only down side is shipping from Eastern Europe can take 2 weeks to a month to get stuff to the USA.
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