Not to sound like an idiot, but I'm familiar with:

FS = for sale
FT = for trade
WTB = wanted to buy

But what on earth is WTD?

__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280