hi just joined the forum and need help. I have an audi a3 1.9 tdi sportback. recently when travelling between 65 and 70mph the glow plug symbol and engine management lights come on and car hiccups. it is as tho the key has been turned off and on its that quick. the 2 symbol lights then go out and car runs with no further problems . it is happening once a day at least . I have had it at the garage and they ran diagnostic check and only error that came up was glow plugs. I had a new set put in but same problem still persists. my bill was £162 and am asking if anybody can help me before I shell out more money.