Received the updated part.
Old on the left (Germany) vs. New on the right (Hungary)
Unfortunately, there's a bracket/support right above the sensor that doesn't allow enough clearance to simply unbolt and replace it.
Step 1 - Remove the two nuts holding down the sensor (10mm).
Step 2 - Driver side at the rear of the console, remove a torx head screw. Couldn't find the right size torx so used an allen key instead.
Step 3 - Again, driver side. Remove the same size torx screw on the bracket support that's above the sensor. It's at a weird angle and the head is facing towards the front of the vehicle. WARNING - This step will take longer than all the steps COMBINED. There's not much room and I could barely do 1/4 turn at a time. Can you say knuckle buster. Also, be careful not to drop your tool because there's pit near there and it will go underneath the carpet.
You don't need to remove anything on the passenger side. The torx head screw on the actual bracket/support is hard to get to because the airduct is directly above it.
Step 4 - Back to the driver side. Carefully pull up on the offending bracket and work the sensor out. The bracket will bend as its made of plastic but be careful not to break it.
Step 5 - Disconnect the sensor from the harness. Press on the release that's only on one side. Replace it with the new one and reverse the steps to reinstall. You're done. Afterwards, you should not have the DCS/xDrive light and SLS Inactive message.
* Tips for re-installing *
Put the lower torx head screw first (loose) before trying to fit the one on the bracket/support. This will help to align it when you're trying to thread it in place.
When putting back the console you will have to align the airducts that are in the bin and on the floor. Best way is to first pull the console a little bit towards the rear of the vehicle. Align the one in the bin first. Then push the console forward making sure that the connection between the one in the bin and the floor is good. The one in the bin should go inside the one in the floor.