Wipers, turn signals do not operate

If you can specify exactly what is no longer working, this would help us find the common denominator Check all fuses, which is in the glove box and the right side of the boot, visually or best with a test light on each pole of the fuse. You might have a faulty combination switch, which is the switching centre on the column and i believe it incorporates the SZL too, so requires proper diagnosis, replacement and coding/programming by a BMW dealer. Good luck.