2018 L494 RRS

Began to smell a mouldy type smell throughout the week having been driving in very wet conditions. On investigation discovered a damp passenger footwell on the outer edge nearest the door.

The inside lower door panel was obviously wet through too when I looked.

So, I imagine this is a seal issue and the water is coming from the outside in.

Have check AC drains and they’re all clear, don’t have a sunroof, coolant level is also correct.

So, just trying to get confirmation that my suspicion of a door seal is correct or just a there anything else to think about?

Thanks in advance!