Yes, the inside of the garage needs more light. And, in general, try to avoid putting dark, in particular black objects, in the shade as they seem to disappear then. A light grey metallic car should be OK. Be careful, too, with evironmental/world light and sky textures as such light is tricky and often needs fine tuning. In particular when you want to give the impression of late afternoon with cloudy sky. Better try strong sun about noon. And as I see, Kołobrzeg changed a lot since mid-1980s