There are 8 models in the scene.
– oven H7460BP 600 mm in four colors;
– cut-in exhaust MIELE DA 2668;
– hob MIELE KM 6542 FL 750 mm;
– hob MIELE KM 7474 FL 800 mm;
– refrigerator MIELE KFN29683D black;

https://3dsky.org/3dmodels/show/kollektsiia_bytovoi_tekhniki_miele_17 
https://3dsky.org/3dmodels/show/vreznaia_vytiazhka_miele_da_2668_884_mm 
https://3dsky.org/3dmodels/show/keramicheskaia_elektricheskaia_varochnaia_poverkhnost_miele_km_6542_fl_750_mm 
https://3dsky.org/3dmodels/show/keramicheskaia_elektricheskaia_varochnaia_poverkhnost_miele_km_7474_fl_800_mm 
https://3dsky.org/3dmodels/show/dvukhkamernyi_kholodilnik_miele_kfn29683d_v_trekh_tsvetakh 

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.