The Wxxx numbers are chassis codes, as explained at http://mbspy.bacosys.be/wcodes.htm
. MB tends to make the same chassis for 5-15 years. Engine codes are an M number, such as m103.nnn for the mid-late 80s sohc 6 cyl used in several chassis.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E