Our recently aquired second-hand van came with a pile of instruction books for the fridge, heater, water heater system, the van itself etc. I thought I would have the necessary information for everything. However, I find that the heating system handbooks tell me how to install the system from scratch but give very brief and insufficient instructions for how to use it. The caravan book has details of all the possible variations of heating systems fitted except the one that is actually fitted. The 'van handbook refers to the tyre pressures 'as quoted in the specifications' except there isn't a 'specifications' section. I don't know if this is typical but why is the information supplied with 'vans so poor?