I have an expression ,n,reg , I am the 2nd owner from new and have had it 3 years now , only problem I have is the condensation I have on the inside side and especially the rear window , it always happens in autumn / winter . I was told once that it is a filter fault / needs renewing , but I was never told where it was or shown , , please can somebody help .

richard tarbotton, November 2013

I don't think the filter will cure the problem. Take the carpet out of the boot and check for water, any moisture in the boot will always cause the windows to mist up.

thejamesclan, November 2013

You will need to be more precise about the make and model of the car that you have. Renault made cars with "expression" trim levels from Clio, Megane, Scenic, Laguna, Espace, Kangoo...

Could be the cabin (pollen) filter hasn't been renewed recently. Often get overlooked.

ChicksFan, November 2013