2009 Mercedes-Benz ML320 BLUETEC Q&A

2009 Mercedes-Benz ML320 BLUETEC Question: Has anyone experienced condensation forming on the exterior of the windshield

directly above the defrost vents. I have never encountered this in any other auto I have owned, and wonder if it is common, like MB indicates it is. -
Answer 1
maybe your heater core is leaking or vent tube is clogged -
Answer 2
good old germans. seek diag as to issue and get est.poss heater core or other coolant leak -