How much trouble is it to change the T-Stat on an '04 225?

 

Try this DIY:

http://forums.audiworld.com/showthread.php?p=16925102

cheers

 

Wow - nice write-up! Anyone else try it and can endorse it? No gotcha's?
Also which ECS T-Stat should I order?:

Thermostat - 82C
Whaler (Germany) brand, cooler than the OEM temperture
Brand: Original Equipment SupplierES#:7013 Mfg#: 050121113C 82D Qty:

Ships in 1-3 days $20.01

Thermostat - 87C
Behr, made in Germany
Brand: ES#:544 Mfg#: 050121113C Qty:

In Stock $17.97

Thermostat - 87C
Wahler (Germany) brand, cooler than the OEM temperture
Brand: ES#:7015 Mfg#: 050121113C 71D Qty:

In Stock $20.26

Thermostat - 87C
Thermostat for your VAG product
Brand: Original Equipment SupplierES#:1899422 Mfg#: 050121113C Qty:

Ships in 4-7 days $10.95

Thermostat - 87C
Thermostat for your VAG product
Brand: ES#:261231 Mfg#: 050121113C Qty:

In Stock $28.08

Thermostat - 87C
Thermostat for your VAG product
Brand: ES#:1306802 Mfg#: 050121113C Qty:

In Stock $9.95

Thermostat- 87C
Thermostat for your VAG vehicle
Brand: ES#:1891980 Mfg#: 050121113C

 

If it were me (and it will be soon as I think mine is faulty) I'd just pop by the dealer and pick one up.

FWIW, here's another DIY. It's from the UK forum. Can't speak to their recommend part numbers as their engine codes are different from ours. But, just remember to get the G12 coolant as the green stuff will not work.

http://www.tt-forum.co.uk/forum/viewtopic.php?t=56316

 

I've used that first writeup. Its kinda tricky to get to, but pretty straight forward work.