Thermostat on 2.5 TDI A6

[ainarssems]

Thermostat started sicking open on our A6. Most of the time OK, sometimes takes forever to warm up.

Changing it is front off and all belts off job. Belts need changing in 10-15k miles and I was going to do it next summer. Not sure what to do :

1. Leave it alone and hope it does not get worth and change everything next summer because weather is not all that good to do it outside although I might get a space in garage if they are not too busy.

2.Just change thermostat @£10 and £30 for timing tool rent and do the belts next summer. But do not fancy doing it twice.

3.Change the whole lot but looking @ over £400 for belts, rollers, tensioners, damper, water pump, thermostat, coolant. After some unexpected expenses I do not have spare £400 available and this would mean no winter tyres this year.