Mercedes Seats problem

[TNW]

Hi - hopefully the right place for this question and to get some advice. I've got a 2015 C-Class company car that was spec'ed (they are all the same) with white cloth seats. These seem to all have a fundamental issue where if they get slightly wet (for example if the door is opened to get in while it's raining) they end up staining right away with what looks like coffee marks. All rather odd, you'd thought they would have tested this (all the cars in the pool at work have the same problem), but I guess most people spec darker seats or leather.

Anyway, I've tried to restore the seats with a mild seat cleaning foam and when that didn't work I had a go with the steam cleaner. Nether had much effect. I've attached a photo to show how they look, they are clean but rather unattractive as the effect has built up over time. While the issue is the same for the whole seat, the seat bases are much worse. Any ideas to restore them much appreciated

[Prestige Detail]

A Interior cleaner and wet vac, may need a few hits if really dirty.

It's only the seats being dirty that then dry. You could also seal the seats with a interior treatment to help protect them in the future.