S3 fuel filter change (how many miles)

Marshy

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Just as the title here I have a 10 plate S3 which has done 50k with full Audi history.
After checking the service book I noticed the fuel filter has never been replaced! After a call to the dealer today I was advised there's no recommended replacement interval on petrol cars.
From previous cars I've had with the TFSI engine the fuel filter used to be 40k

When are people changing these? As I'm not happy its run 50k without a fuel filter with full dealer history.
Thanks