My 2005 4/4 with the same tool tray has jack, jack handle, flat eight-sided spanner for the locknuts, and a smallish "lead" hammer with a wooden handle. Also a space for a warning triangle.

The spanner and hammer are marginal for the task of removing the locknuts, so I don't use them. Instead I use a larger Thor nylon faced hammer and a locknut removal tool supplied by MWS, which effectively turns the locknut into a two-eared spinner and makes the job so much easier.

Here it is
http://shop.mwsint.com/product_details.asp?id=179

My tray however has some cracks, which is a common problem. Several people have replaced theirs with wood or alu trays.

Nigel