
How do you know the autobox is at normal temp?[/quote]
Agree about the planning ahead and the overcrowding! The brakes are adequate of course but its always reassuring to know you've got some stopping power in reserve for when the (probably) BMW driver cuts you up

I've tested the autobox with my Haydn temperature gauge before now. When I bought it I didn't tow, so just bought the single sensor one. Now I tow I wish I had have bought the double, one for the engine, one for the box. What I did when I first for the caravan was move the temp sensor onto the box for a couple of hundred miles. I can't remember what the temperatures were now but they rose to around the same whether towing or not. Happy (as you can be) that the box wasn't being overstressed I put the sensor back on the engine.