GU TD42 Dash temp Gauge problem

[Wizard52]

The factory gauge is designed to sit wgen in the normal range of temperature so a flat spot makes perfect sense. It achieves operating temp then won't move up again until it goes outside the standard temperature range.

This is what is doing my head in with the Redarc gauge, it captures every degree of change so you see the movement. That factory gauge just says ......Normal.

Agree. My factory gauge gets to normal position at 60c (reading from VDO gauge) and never moves no matter what happens. The real gauge (VDO) goes up and down like a you know what depending on ambient temp of course and driving conditions so varies from 80 at normal to 105 when required. It is reassuring to have the backup of factory gauge just in case. The VDO oil pressure gauge is invaluable as well showing 70psi at cold start up reducing to 60psi at crusing speed. I love these 4.2tdi engines.