Hi;

It rained yesterday and today I found water on the passenger side, front and back seat's floor.

Any hints?

Ray
1999 C230 Kompressor

Check the sunroof drains for blockage.

Can you tell if water fell to the ground when you opened the door?

Hi Ray, there's a drain that routes all the water that rolls down the windshield to the ground that's probably clogged. It's located under the hood, on the passenger side, near the firewall. Just open the hood and look down at the bottom of the black plastic thing. Kinda' like where the battery would be on an older Benz. When this drain gets clogged, rain water fills up the collector. If enough water accumulates, it enters the cabin through the fresh-air door and ends up in the right front footwell area. To fix the problem, just pop off the rubber drain flap and unclog the drain. Throw away the flap. Hopefully,no damage was done to the blower motor.