We've just started taking on new package cars in the past few months, they're based on the new weight Mercedes Sprinter as the larger Mercedes Vario pictured here has ceased production
The new trucks are similar size but have a 2 ton lower gross weight after a lot of package cars were weighed when leaving and returning to the center and it was decided the current 7.5ton weight wasn't needed as they would bulk out before hitting close to maximum weight. Mercedes along with the body manufacturer Spier have developed 3 new trucks P60, 70, 80 ranging from 3tons to 5.5 tons and with different body styles for different environments.
http://blog.ups.com/2013/01/09/see-more-hear-less-new-ups-vehicles-in-germany/
The new P60
P80