Multilayer coating systems obtained from block copolymer containing basecoat compositions

A multilayer coating system present on an optionally pre-coated substrate and comprising at least three coatings layers L1, L2 and L3 different from one another, the multilayer coating system comprising:

• a first pigmented coating layer L1 applied over at least a portion of an optionally pre-coated substrate,
• a second coating layer L2 applied over the first pigmented coating layer L1, and
• a third coating layer L3 applied over the second coating layer L2,
• wherein the second coating layer L2 is formed from a coating composition comprising at least one block copolymer containing a backbone and at least two blocks B1 and B2 different from one another,
• wherein block B1 comprises at least one kind of side chains S1 attached to the backbone and block B2 comprises at least one kind of side chains S2 attached to the backbone, which are different from side chains S1, wherein each of side chains S1 comprises at least one polymeric moiety M1 selected from the group consisting of polyester, polyether and poly(meth)acrylate moieties, and each of side chains S2 comprises at least one polymeric moiety M2 different from polymeric moiety M1 and selected from the group consisting of polyester, poly(meth)acrylate, polyether, polysiloxane and polystyrene moieties.