[BRAN]

Don't disassemble the vents, they are not meant to be!

The trick is: It all can be done from the front!
1.) Disconnect the connector carefully first.
2.) Pop the louvers carefully from the slanted side (facing towards the door) with a screwdriver, access them from above, pushing towards the middle. They will "pop" from their mounting holes.
3.) NO WORRIES...they all have a TINY number imprinted (except of the leather cover ones for obvious reasons) to keep the order for reassambly.
4.) Reassembly: pop all louvers (in order) into that connector FIRST.
5.) Carefully fiddle all pins into the mounting holes of the "INNER" side first.
6.) Carefully pop the other side one-by-one back in, on the other side (little force required, but not too much)

The side wheel...seems easy but is not...too diffucult to describe. But it is possible, once you understand and see all Little Pins and connectors. It can be done, just be patient.