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In this contribution we present new near-infrared (NIR) data on the quasar 3C48 and its host galaxy, obtained with ISAAC at the Very Large Telescope (ESO,Chile). The NIR images and spectra reveal a reddening of several magnitudescaused by extinction due to molecular material and dust within the host galaxy.For the first time we clearly identify the highly reddened potential secondnucleus 3C 48A about 100 northeast of the quasar position in the NIR. Itsreddening can be accounted for by warm dust, heated by star formation or aninteraction of the 3C 48 radio jet with the interstellar medium, or both. TheNIR colors and the CO(6-3) absorption feature both give a stellar contributionof about 30 percent to the QSO-dominated light. These results will contributeto the question of how the nuclear activity and the apparent merger process areinfluencing the host galaxy properties and they will improve existing models.Comment: 4 pages, 2 figures, to appear in " Proceedings of the 4th  Cologne-Bonn-Zermatt-Symposium ", ed. S. Pfalzner, C. Kramer, C. Straubmeier,  and A. Heithausen (Springer Verlag

The Merger QSO 3C 48 and Its Host Galaxy in the Near Infrared