As an idea.. (And potentially beneficial for your "new purchase")
Look on EPER the official parts resource.. I believe it does list 'accessories'... See if the towbar part number changes through the life of the 169 panda.. And which model variants they fit
At 12 /18 months after launch (Jan 2004 basically in the UK). I Wouldn't anticipate major revisions.
Many sellers don't truly know the differences!
If EPER is coloured.. Click on it.. It's a link
Otherwise type it info the forums SEARCH.