C270 CDI Thermostat change. W203

[grumpyoldgit]

Hi guys,

My 2005 W203 C270 CDI is running on the cool side, it struggles to reach 60º -ish, most of the time now the cold weather is with us.

I've bought a new thermostat from ECP, but of course it only comes with the stat to engine rubber seal. Am I correct in assuming that I will need new O rings for the temperature sender and the by-pass pipe?

Is there anything else I might need, apart from new anti-freeze?

Thanks in anticipation.
Mike