Having only just found this Forum, let me add my two pennyworth.My 2010 1.2 tsi dsg Auto gave just the same symptoms last Feb. Local Skoda dealer replaced No.1 HT lead under warranty.Last Sunday, 5 May, same symptoms again! This time No. three lead changed but warranty now expired! After STRONG remonstations on my part agreed Skoda pay 70% I pay 30% which came to £22. I asked how long before the other two fail, but got no satisfactory answer of course. Both new leads are of type described by others with corrugated outer sleeve. Upon enquiring what this was for, I was told, (wait for it ) "because they have had trouble with mice nibbling the cables"!!!!!
I am now in the process of buying a full set of four new leads from an independant source, to carry with me.