Yeah, done the front shocks on the tourer. Not a diesel mind but the 2.4. It's not really difficult, the worst bit is using the spring compressor. I presume you're just replacing the shock and not the whole coilover?
TBH - the hard work is listed here. http://www.youtube.com/watch?v=Ce5c6eUPW4s
ETCG - brilliant videos.