A method to adjust a first temperature (T utenza) of an element (15a, 15b, 15c) of a motor vehicle to be interfaced with a passenger of the motor vehicle, comprising the steps of: i) adjusting a second temperature (T cabina) on the inside of a passenger compartment of said motor vehicle based on a third temperature (T richiesta) currently requested to an adjustment system (23, 24) for said second temperature (T cabina) itself; ii) detecting a fourth external temperature (T out) on the outside of a passenger compartment of said motor vehicle; and iii) detecting a current value of said second temperature (T cabina) on the inside of said passenger compartment of said motor vehicle; iv) detecting a current value of the first temperature (T utenza) of said element (15a, 15b, 15c); v) processing a fifth temperature (T prev) based on said first, second and third temperature (T utenza; T cabina; T richiesta); and vi) exchanging a heat power with said element (15a, 15b, 15c) so as to adjust said first temperature (T utenza) based on said fifth temperature (T prev); said step v) comprising the step vii) of processing said fifth temperature (T prev) also based on said fourth temperature (T out); characterized in that said step vii) comprises the step viii) of processing said fifth temperature (T prev) based on the following formula: Tprev = α ∗ Tutenza + β ∗ Tcabina + γ ∗ TRIF − Trichiesta, wherein: - T RIF is a sixth reference temperature that can selectively be set; - α and β are coefficients that depend on said fourth temperature (T out) and are independent of said first, second and third temperature (T utenza; T cabina; T richiesta); and - γ is a constant coefficient. i) adjusting a second temperature (T cabina) on the inside of a passenger compartment of said motor vehicle based on a third temperature (T richiesta) currently requested to an adjustment system (23, 24) for said second temperature (T cabina) itself; ii) detecting a fourth external temperature (T out) on the outside of a passenger compartment of said motor vehicle; and iii) detecting a current value of said second temperature (T cabina) on the inside of said passenger compartment of said motor vehicle; iv) detecting a current value of the first temperature (T utenza) of said element (15a, 15b, 15c); v) processing a fifth temperature (T prev) based on said first, second and third temperature (T utenza; T cabina; T richiesta); and vi) exchanging a heat power with said element (15a, 15b, 15c) so as to adjust said first temperature (T utenza) based on said fifth temperature (T prev); said step v) comprising the step vii) of processing said fifth temperature (T prev) also based on said fourth temperature (T out); characterized in that said step vii) comprises the step viii) of processing said fifth temperature (T prev) based on the following formula: Tprev = α ∗ Tutenza + β ∗ Tcabina + γ ∗ TRIF − Trichiesta, wherein: - T RIF is a sixth reference temperature that can selectively be set; - α and β are coefficients that depend on said fourth temperature (T out) and are independent of said first, second and third temperature (T utenza; T cabina; T richiesta); and - γ is a constant coefficient. said step v) comprising the step vii) of processing said fifth temperature (T prev) also based on said fourth temperature (T out); characterized in that said step vii) comprises the step viii) of processing said fifth temperature (T prev) based on the following formula: Tprev = α ∗ Tutenza + β ∗ Tcabina + γ ∗ TRIF − Trichiesta, wherein: - T RIF is a sixth reference temperature that can selectively be set; - α and β are coefficients that depend on said fourth temperature (T out) and are independent of said first, second and third temperature (T utenza; T cabina; T richiesta); and - γ is a constant coefficient. - T RIF is a sixth reference temperature that can selectively be set; - α and β are coefficients that depend on said fourth temperature (T out) and are independent of said first, second and third temperature (T utenza; T cabina; T richiesta); and - γ is a constant coefficient.