Question about winter driving. Imagine the scenario... VERY steep icy/snow covered hill. The vehicle is a C5 allroad with Goodyear 4Season (snow marked & M+S) marked tyres with the tiptronic auto box. If the car was just left in first or second the hill is so steep that engine braking alone is not sufficient and the car goes too fast. So my thinking is to put it in to apply the brake, put the car in to 1st gear via the manual tiptronic selection and release the brake a fraction (not touching the accelerator) so that there is still some braking force, but so little that the wheels can still rotate very slowly.i.e. the engine is pushing the car forward but the brakes are fighting it a little resulting in the car going down the slope in a controlled manner. My question is been as the engine/gearbox wants to move the car forward but the brakes are fighting it, how much strain or potential damage is/could this be doing to the gearbox/1st gear? Hope this makes sense.