Not sure if I can help, but I thought that the wiper shaft was adjustable in some fashion? You may have to pull of the body panel to get behind there and see...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car