We present multiwavelength (MWL) observations of the high-frequency-peaked BL Lac object 1ES 1011+496 (z = 0.212 ), based on very high energy (VHE, E > 100 GeV) observations performed with the stereoscopic system of MAGIC in 2011 and 2012. The system, located on La Palma, Canary Islands, Spain, consists of two 17 m diameter imaging Cherenkov telescopes allowing measurements down to a threshold as low as 50 GeV. While VHE observations in 2011 yielded a barely significant detection, 1ES 1011+496 was clearly detected in 2012 by MAGIC allowing a detailed measure of the differential spectrum. During both years the flux level above 150 GeV was compatible to that previously observed by MAGIC in this energy regime, and the source did not show any statistically significant variability in VHE γ-rays. Complementary MWL campaigns during previous VHE observations with MAGIC performed in mono mode, were lacking high energy (HE, E < 100 GeV) detection to cover the second peak of the spectral energy distribution (SED). The observations presented here provide a more precise determination of the SED which are reproduced with a one-zone Synchrotron-Self Compton (SSC) model. In particular, the inverse Compton (IC) peak is well constrained for the first time by the simultaneous coverage in HE and VHE γ-rays by Fermi-LAT and MAGIC. In addition, the results of optical polarimetric studies performed in 2012 will be shown in combination with multiepoch radio maps.