I need some help i have a 2002 ml320 alot of water under the drivers side dash when it rains pouring in !!!!
any advice would be apprecated had problem when truck was under warranty
said drains for sun roof were disconnected had to remove all interior panels to reconnect
any advice not to sure i want to mess with interior myself

 

could also be were the drain tube from the roof goes into the driverside kick panel on the side and goes out threw the door jam and behind the wheel well liner. you could pour water in the sunroof drain and remove the A pillar panel and see if water is running down the A pillar panel to the dash then the floor. remove the kick panel beside your feet to the left and then you can look up and see where the hose exits the car but its hard to see its about 7-10 inches up. the hose falls out of the body and the water dumps in to the floor. but if you pull the hose to hard you can pull it off the sunroof drain again.....also check the drains outside the car, under the car a few inches from where the wheel well starts at the front theres a Torx shaped tube sticking out put a screw driver up into there and also the other side of the car too

 

Thanks for the great advice will check today