After buying a second hand P206 the climate control module wasn't backlighted. Here is how to dismantle the console. This process is also suitable in case changing your audio head unit.

A patience and a thin fingers are appreciated when reassembling cables to the climate control module. Original bulb type: T5, 12V, 1.2W. A good advice is to replace bulbs with 12V LED to avoid repeating a job every few years.