There are 11 models in the scene.
– oven H7264B 600 mm in four colors;
– oven H7244BP 600 mm in four colors;
– hob MIELE KM 6542 FR 750 mm;
– hob MIELE KM 7210 FR 800 mm;
– wall-mounted hood MIELE DA 4298 W.

https://3dsky.org/3dmodels/show/kollektsiia_bytovoi_tekhniki_miele_16_1 
https://3dsky.org/3dmodels/show/kollektsiia_bytovoi_tekhniki_miele_14 
https://3dsky.org/3dmodels/show/keramicheskaia_elektricheskaia_varochnaia_poverkhnost_miele_km_6542_fr_750_mm 
https://3dsky.org/3dmodels/show/keramicheskaia_elektricheskaia_varochnaia_poverkhnost_miele_km_7210_fr_800_mm 
https://3dsky.org/3dmodels/show/nastennaia_vytiazhka_miele_da_4298_w_898_mm 

Each model consists of several elements everything is assembled into one object and multi-material is assigned. All materials were renamed and simplified as much as possible I converted the Corona Render materials and did NOT check them in the scene for rendering check the model in a separate scene.

The FBX file contains all the models with materials. There are no materials in the OBJ file only geometry.

Who works in V-Ray version lower than 3.1 be careful in the materials in the BRDF section there is Microfaset GTR (GGX) if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you.