The VIP Service is available as VIP Service Business for Schengen departures (you need to check in yourself, but can skip security via VIP Lounge (45 minutes time in the VIP Lounge) for 180 EUR. The VIP Premium Service is 350 EUR per person incl. two checked pieces of luggage and two hours in the lounge.

Further information could be found here in German : https://www.dus.com/de-de/informieren/vip-service

I have to admit, that I have not experience with this service. And actually, they are on several days already fully booked