Method for fastening a transparent first part on a second part

The method of fastening a transparent first part (1) of a product (4) for an inner space of a motor car on a second part (2) of the product, comprises sticking the first part of the product with the second part of the product. An acrylic-based adhesive is applied on one of the parts in a region with which the part provided with the adhesive is supported on other part after joining the two parts or is placed in a vicinity of the other part. The part provided with the adhesive comprises a separator element. The method of fastening a transparent first part (1) of a product (4) for an inner space of a motor car on a second part (2) of the product, comprises sticking the first part of the product with the second part of the product. An acrylic-based adhesive is applied on one of the parts in a region with which the part provided with the adhesive is supported on other part after joining the two parts or is placed in a vicinity of the other part. The part provided with the adhesive comprises a separator element, which distinguishes a region to apply the adhesive from a remaining portion of the part provided with adhesive. The remaining portion of the part is designed as a finished product in a field of view of a rider of the motor car. The region provided with the adhesive is heated before applying the adhesive. The sticked parts consist of an amorphous and half-crystalline plastic material or glass. The part of the adhesive is irradiated by the first part of the product with light passing in an UV-wavelength range. Independent claims are included for: (1) a first part of a product for an inner space of a motor car; and (2) a plastic part of a product for an inner space of a motor car.