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I have bought the new Tata Harrier 2020 XZA+ and at the time of delivery i noticed an error message on speedometer, “ Drive control system fault with engine check” upon driving it acceleration was extremely low. I never expected this to happen and upon inspection the dealer came to conclusion that they accidentally filled it with BS4 fuels and as the new Harrier is BS6 it will show these faults and once you fill Bs6 fuel it will come to normal. I mean was that a genuine reply for a 25+ lakhs car ?? Below is the picture of error message. Please tell me what i can do to get this resolved.