Water in the passenger rear seat behind the battery

[ber5ien]

Had anyone had similar situation ? 

I would imagine that leaking sunroof would cause water in the boot?

Is this coming from A/C evaporator in the boot ?

 

[cliffcoggin]

Is that sunroof the fixed or opening type? Opening sunroofs have rain drainage channels or pipes which can become blocked.

[ber5ien]

It is panoramic and the first part opens up

[cliffcoggin]

I have never done this, but if you look at recent forum topics other folk have flushed their channels successfully with warm water. One fellow even used drain cleaner, though the corrosion risk would be too great for my liking.