Yeah several people online have hadt when their ABS module has broken. Thanks for confirming Pete
Yes, ABS transmits the speed data on CAN, for your speedo and such as Pete mentions. There's no need for the Airbag controller to expose information about acceleration, so it doesn't. The processing for the "calculated acceleration" happens in the cluster. I didn't expect this to cause so much discussion, so I wasn't clear in my original post. The cluster is estimating if you're accelerating or breaking, based on the rate of change of speed, and when doing so, slows down/stops its reading of the fuel sender to prevent erratic readings.
The position of the sender in the tank is irrelvant in this case. Ideally VW would put the sensor in the centre of fluid, and the tank would be a hemisphere, and fuel wouldn't splash, that way you'd have a perfect reading regardless. But they can't do that obviously. If they have put the sensor in at 90 degrees to the direction of travel, I would assume this has been done to get closer to that perfect scenario of a central float. The sender is on the far left/right of the tank to begin with, so cornering forces are already going to have a much greater affect than acceleration of deceleration. By pointing the float inwards, you make little difference to the fore/aft position but you get much closer to the centre, thus minimising the cornering affects. It could also simply be packaging. To correct my previous statement, the Fabia dash cannot compensate for steering angle as there is no real accelerometer data, nor is there a steering angle sensor as these cars didn't come with ESP. Golf MK4 on the other hand, that may be different.
I did find it in an SSP a while ago Pete (And confirmed by taking the fuse out), will try and find it