Recently discovered that water intrusion in the back of my vehicle is coming from cracks (longitudinal and transverse) on its roof. The roof has no other damage that would have caused the cracks Upon discovery, I took it to my local MB dealership and the attendant that looked at it said he had never seen such cracks and know the cause. I followed up with the Mercedes Benz corporation, who requested for my VIN, and following review of my complaint told me that there was no recall affecting roof cracks for my vehicle. They suggested that I reach out to you (NHTSA online). I am not sure when these cracks developed. I was aware of it earlier this year. The water intrusion, when not dried and depending on what time of the year, could cause mold which can seriously affect the occupants of the vehicle. It would be appreciated if you take a look at this, as well as if there are similar complaints on this GL450 models

- Baton Rouge, LA, USA