Does anyone know the max noseweight for a 2010Superb Estate 

Think it is 80kg.  I tow a fairly heavy Ifor Williams trailer at times and tend to have a bit of mechanical sympathy on the car and aim for 60 - 65 by adjusting the weight position on the trailer (vintage stationary engines!)....  I also measure the trailer nose weight with bathroom scales and a piece of wood which is cut to length such that the trailer is level when all weight is on the scales.  Hope that helps

Owner's manual says 80 kg in the weights section near the end. If you're missing yours, download it from: http://manual.skoda-auto.com/004/en-com/Model/Superb_3T