I have watermarks on my seats and I am unable to get rid of them.

Does anyone have any ideas please?

Many thanks

Kim Elliott

A carpet extractor should do the trick

I hate to bring bad news to the table but I have come across this before on a Mini (BMW version) where the car was in a flood and based in Cornwall where this is common. The car was subsequently written off and should never have been resold as damage occurs to the electronics and numerous other areas.
It is impossible to get out of the seats and also carries bacteria which can affect your breathing.

If this is the case it will be accompanied by a pungent smell and also things like the seat runners can be corroded making it difficult to move back and forward.
If the car has ever spent time in flood areas in Cornwall then you should investigate further