Most brands have a pickup truck in the programm but worlds biggest producer of vans and trucks, Mercedes-Benz doesn’t! The only pickup trucks that MB has are based on the G- or the Sprinter vans.
On the internet i found an artist-impression of what could have been a pickup but it is an old drawing. Look at the style of the headlights, and that is logical because it is from 2003.
Now with Volkswagen being succesvol with the Amorak they should do something in Stuttgart, and i see oportunities with Nissan. Nissan and Renault work together with Daimler and the first result is the MB Citan on the basis of a Kangoo. The next step could well be a pickup, based on the Nissan Navara!