SLK/R170: Option Packages on 230
K1 - 8 way power seats. manually telescoping steering column.
K4 - Xenon high intensity discharge low-beam headlamps with automatic level control. Heated headlamp-washing system. Heated seats.
K4 is optional on both 230 and 320. K1 is standard on 320, optional on 230.
SP1 is Sport Package. Sounds like 167 is making it clear that it does not have Sport Package. Just a guess.
-Dennis



