If you pull the gromit out where the bonnet release cable is like 16v_jon said it really is very easy. I just did it on my 182 last weekend. The gromit is located on the passenger side behind the glove box.
If you have power steering then i suggest you unclip the resevoir bottle from the passenger side wing under the bonnet, this will allow for easy access to get to the cable once pushed through the gromit.
Seriously its only a 5min job, but If your still struggling give us a shout I live in Leeds