Audi TT Mk1 225 2002 UK Spec, 8N0906018H, ME7.5, HW_MAN004

Hello,

Does anybody know why the Power Train CABUS coolant temperature would be 5-6 °C above the coolant temperature displayed on the climate control console and the dash gauge?
From the FK its says the value should be 0.75x value -48°,

288 Data: EC 5A 14 00 00 7D B7 12
                      |
             Coolant Temp

From cold the Power Train CANBUS value goes up with the displayed temperature, just 5-6 °C above?

Thanks