Water in the interior

Moin together. I’m curious if someone has the same problems. I’ve had a V70 D5 year 2002 since May. Was really excited until it rained more often. Get in one morning and notice a 5 cm high water puddle on the passenger side in the footroom. The friendly one meant this is due to the processes in the engine room, if the protective grills are blocked and dirt in the drainpipe (should probably also have very small diameters) is. Then the water runs into the interior. Must be built apart (disk wiper off and cover off etc. and clear the pipe. Could be that kind of thing? There should be no connection to the interior, or? Recently, the water also gets through at the top of the handles, as though not everything can run off on the roof. That hasn’t happened to me yet with any car. Had so far only German factories. Otherwise, I’m happy with the car, but if this is a problem for many people it scares me to buy a Volvo again. Sometime it rusts from the outside. I’m grateful for your comments.