STLBMZ1 Mercedes SLK and CLK how to enable driving HORN chirps

Question:

I programmed the system to blow the horn when lock/unlock is pressed but the horn does not blow.  I can program it to chirp when lock/unlock with no problems.  I found the horn does not blow unless the key is turned to the on positon.

Answer:

To allow the module to activate the horn for the CHIRP feature, open the fuse box in the right corner of the engine compartment and reseat the fuse shown from position 43A, left slots (1) to position 43B, right slots (2). This change does not affect anything else.
NO fuse needs to removed and NO fuse needs to be added. Just RE-SEAT the already existing fuse.