container ships... not very good at keeping things onboard. This would have been the 18th SLS to hit the Americas

Full story on http://autoblog.com.ar/2014/06/alas-mojadas-la-historia-del-mercedes-sls-que-cayo-al-rio-de-la-plata/ but in short, it was floating half submerged for 5 days before it was pulled out of the ocean.

Via http://www.carcrushing.com/waterlogged-sls-amg/