Hi, my 2008 q7 3.0 tdi will no longer get to full temp on the guage. It will go to about 50 and sometimes 90 after a long time but if i stop then next drive will just stick at 50-60 and refuses to goto normal 90.
Garage has replaced thermostat and water pump but they say it still it wont warm up. Is there something they have missed as it never overheats just runs cool all the time.
Please help :)