My S3 has recently giving me a spot of bother and hoping someone will know what it might be. Driving as usual, and my battery warning light comes on. I carry on driving to get home and then after a minute or two, my ABS and traction lights appear. Also my head unit / sat nav has switced off and died down. Lights/all electrics are either dead or very weak. I then try to get home quicker and tried to put my foot down a little (not thrashing) but it started holding back strongly, like it was being restricted of airflow (sudden hicups). This has happened once before on the motorway about 2 months ago, but that time the battery warning light never came on and once I got it towed home it started without any issue - I was told it had a faulty MAF sensor. Could this be a battery/alternator problem as thats what I think or a MAF sensor problem..? Any advice/help would be very much appreciated..