from the text,a faulty thermostat will cause the engine to run cooler,and not overheat so no worries either way!
but yes is the same as the 2003 according to specs
Checking the thermostat
1. Check that the thermostat closes completely.
2. Heat up water in a vessel to 68°C 1 154.4°F
(MD2O10, MD2020), or to 75°C / 167°F (MD2030,
3. Submerge the thermostat in the water. Check after
at least 3-5 minutes that the thermostat is still
4. Raise the temperature to boiling point (100°C /
212°F). Check after 3-5 minutes that the thermostat
has opened at least 6 mm /.02362 in
(MD2O10, MD2020), or to 8 mm /.3149 in
Replace the thermostat if these specifications are not
met. NOTE! If the thermostat does not close completely
the engine will run at too low a temperature.
Fig. 109. Replacing the pump wheel
2. Pull and twist out the pump wheel
(impeller) with a
pair of universal pliers.
3. Clean the housing internally. Grease in the pump
housing and inside of the cover with a little grease.
4. Press in the new wheel with a rotational motion
(clockwise). Fit the sealing washer on the outer
end of the centre of the wheel.
5. Fit the cover together with a new gasket
6. Open the bottom cock, or the cock on the S-drive.
Start the engine and check that no leakage occurs.