New rear diff. When sdhould it be re-serviced?

[Schlaag]

Hi

We had our S3 rear diff replaced under warranty. It ended up being goodwill after we found out the car had never had a haldex service despite being bought as an audi approved car!

My question is, now the diff is brand new... when should it have an oil/filter change/service?

Should it be at 3,000 miles for its first oil change then standard mileage thereafter?

thanks