Ford (F -0.17%) and General Motors (GM -0.92%) have both lost big money in Europe in recent quarters. The problem is a structural one -- auto sales are at lows not seen in almost 20 years, and there are too many car factories making not enough cars.

Both have elaborate turnaround plans under way, but both would love some help from the economy. April's sales results suggested that things might be stabilizing, but will May continue the trend?

May sales results for all of Europe won't be released until next week, but there are some early signs available -- and it's not looking good. In this video, Fool.com contributor John Rosevear runs through the numbers we have -- and explains what it means for Detroit's two giants.