Can the inspection date be extended or not?

We purchased a R 230 in October 2011, first registration in 09/2010, 4,500 km on the clock. Before delivery, the first inspection was made in October 2011, i.e. 13 months after the first registration. Although the inspection interval is 25,000 km/max 12 months, the mouse cinema already registered in September 2012 for an inspection. The vehicle is a so-called “Young Stars” car. The inspection was carried out due to vacation only in October 2012, i.e. a little later. If one looks into the conditions of the “Young Stars Warranty”, then it is recorded that the inspection date can be exceeded by 1 month, a maximum of 1,000 km. I mailed the center of DB in Berlin in this regard. This is on the point of view, the year date, here 09/2012, should not have been exceeded in any case. My contract workshop as well as the conditions of the above mentioned “Young Stars Warranty”. Incredibly, the interlocutor in Berlin was not aware of this deviating determination in the “Young Stars Guarantee” on demand at all. How do you see this? Do you keep penance?