  The continuum percolation for Markov (or Gibbs) germ-grain models is
investigated. The grains are assumed circular with random radii on a compact
support. The morphological interaction is the so-called Quermass interaction
defined by a linear combination of the classical Minkowski functionals (area,
perimeter and Euler-Poincar\'e characteristic). We show that the percolation
occurs for any coefficient of this linear combination and for a large enough
activity parameter. An application to the phase transition of the multi-type
Quermass model is given.
