2009 FREIGHTLINER SPRINTER 2500 Structure Problems

THE METHODOLOGY/GASKETING/ WHATEVER IS SO INADEQUATE ON ROOFTOP AIR CONDITIONING UNITS THAT THESE VEHICLES ARE "SEMI-JOKINGLY" CALLED RAIN FORESTS DUE TO UNBELIEVABLY BAD AND CHRONIC AND DANGEROUS RAIN LEAKING THROUGH THE ROOF. A SIMPLE GOOGLE SEARCH ON "SPRINTER ROOF LEAK" BRINGS BACK MANY, MANY RESULTS -- INCLUDING YOUTUBE VIDEOS OF THE OUTRAGEOUS AMOUNT OF LEAKING. THE REAR PASSENGERS IN SOME SPRINTER VANS ARE GETTING A SHOWER THAT THEY DON'T EXPECT. THE REAR AIR CONDITIONING SYSTEM IS REPORTEDLY LEAKING IN SOME MODELS, AND OWNERS ARE BOILING MAD. A CLASS-ACTION LAWSUIT WAS FILED IN CALIFORNIA ALLEGING THAT MERCEDES KNEW ABOUT THE PROBLEM AND DIDN'T FIX IT. BAD SEALS AROUND THE ROOFTOP, REAR AIR CONDITIONER ON SOME SPRINTER 2500 AND 3500 MODELS ALLEGEDLY CAUSE THE LEAK. DRIVERS CLAIM THAT IT'S BAD ENOUGH TO SEEM LIKE IT'S RAINING IN THE VEHICLE, AND SOME OWNERS SAY THAT IT LEADS TO MOLD AND WATER DAMAGE AROUND...