Maintenance costs Cupra Ateca

Dear Cupra owners, I am just configuring my first Seat (i.e. Cupra). Therefore, I am new to this brand. The friendly Seat dealer offers me a “all inclusive carefree package : with all customer services and wear parts for around 38€/month. At 15,000km/year and 3 years runtime I am unsure whether this is not drastically too much. A bit more would be ok… And of course you can’t compare it with the cost of a free workshop. .. How expensive are your customer service costs at the friendly Seat contract workshop? I don’t plan a (!!!) Brembo plant…