Engines and model designations are new and the range of body styles is narrower for 2006 in the least-expensive Mercedes-Benz car line. Gone are wagons and coupes. Sedans survive and offer a choice of rear- and all-wheel drive. Models are defined by their engines and by Sport or Luxury designations. Sports include a sport suspension, unique appearance details, and aluminum vs. wood interior trim. The C230 Sport for '06 gets a 201-hp V6 in place of a 189-hp supercharged 4-cyl. The C280 Luxury has a 228-hp V6. It replaces the 168-hp C240. The C350 Sport and Luxury have a 268-hp V6. They replace the 215-hp C320. Again topping the line is the C55 with a 362-hp V8. The C280 and C350 Luxury are available with Mercedes' 4Matic AWD. C230 and C350 Sports are available with a 6-speed manual transmission. All other C-Class cars use an automatic transmission with five or seven speeds, depending on model. Standard are ABS, traction/antiskid control, and curtain side airbags. Rear side airbags are standard for C55, optional otherwise. Options include a navigation system, bi-xenon headlamps, and 60/40 split folding rear seat.