Mainz also signed 29-year-old Hungarian left-back Zsolte Lővér from fellow newly-promoted side Hoffenheim.
The player was Hoffenheim's starting left-back in the 2nd Bundesliga last season and performed well.
But now, Rangnick preferred Austrian international Ibertsberger, who had joined in January 2008.
With only one year left on his contract and unable to agree on an extension due to a lack of playing time, Lővér was sold by Hoffenheim to Mainz for 200,000 euros.
With Van der Heyden, Lővér, and Demetraz, Mainz now had three solid left-backs for the new season.
Most importantly, they had barely spent any money.
Up front, after the departures of Borja, Jovanovic, and others, Mainz spent 750,000 euros to sign 25-year-old Burkina Faso center-forward Aristide Bancé from Ukrainian club Donetsk Metallurgy.
As an African center-forward, Bancé possessed an incredibly impressive physique.
