The Japanese carmaker's four-cylinder boxer engines continue to cause a headache, now leading to a class action lawsuit.

The problem is, for a relatively small car ... means it's not all that much fun to drive around town. Now that Subaru has a diesel engine available in Europe and coming to the U.S. in 2010 ...

The problem is ... unresponsive. Subaru has added extra sound deadening to the updated Forester and while it better isolates gruffer engine notes on the move, the diesel motor stills clatter ...