C5 Heater Core Issue?

Wingc5

Regular user
Hi all,

reading about the heater core leaking and wondering if my C5 has this issue. The interior heats up fine, then when I go back to the car after it's been parked for a while post heater use, I'm often surprised with how much moisture is on the inside. I have seen a slight filmy type build up on some of the plastics when the car hasn't been used for quite a while, but I'd put this down to dampness due to slight water ingress. How can I tell for certain that the heater core is fine/is the problem?

Cheers.
 
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