This paper presents the design, manufacturing and testing of a 2 + 3 T high field MgB2 ø178 bore solenoid magnet demonstrator (around 55 kgs). The magnet was designed to produce 2 T standalone at 10K and to be operated in a homogenous background field of 3 T. The magnet is helium free and is cooled down by a cryocooler. Three lengths of Columbus MgB2 conductors (1.6 kms) were used to wind the magnet linked together by two resistive junctions. The thermalization of the magnet and theses junctions is also addressed. A full set of instrumentation involving four punctual heaters and one azimuthal heater were implemented in the magnet for quench propagation studies along with voltage taps for current density control and operation. As it is a cryocooled magnet, in order to measure the temperature of the magnet, different parts of the magnet were equipped with cernox. The results of the first tests will be described and the magnet performances presented.