Mercedes-Benz Sprinter 2500 water leaking from passenger side AC vent, possible clogged drain tube on Mercedes-Benz Sprinter 2500

Some Mercedes-Benz Sprinter 2500 owners report experiencing water leaking from the passenger side AC vent, which may be attributed to a clogged drain tube. This issue can often be traced back to blocked drain holes, including the water drain from the airbox. Additionally, clogged sunroof drain holes on the passenger side can cause water to drip under the dash. Owners have noted that if water accumulates in the back passenger side, it could be due to water from the front running back, particularly if parked on an incline. In some instances, a loose drain hose from the AC unit can lead to unexpected water accumulation in areas like the back seat floor. To resolve these issues, it may be necessary to remove leaf guards near the windshield to access and clear any blockages in the drain tubes.