The arm rest 4, wherein {HEAD ~ the locking element} includes {TAIL ~ a latching element} by which the guide rods can be locked in discrete elevated positions in the guide channels 
The arm rest 4 , wherein { HEAD ~ the locking element } includes { TAIL ~ a latching element } by which the guide rods can be locked in discrete elevated positions in the guide channels
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH