Hello members.I have the following problem : I`ve chosen my future audi which i want to buy but there is a problem with it..Ok so it is an Audi A4 Avant 1.9 TDI with Pump-duse 116 hp it`s manufacture date is 11.2000.I like the car very much and yesterday i went for a ride with one of the people who work in the car
house.We drove about 4-5 kilometers with a lot of speed and a lot of brakes so i can feel the car but suddenly on the dash board a red lamp appeared with this sign in it (!) and the lamps for ESP and ABS went on..We stopped and turn off the car and then turn it on again and everything was OK until 3-4 min later the same thing happened but as the lights for ABS were on indicating that there is a problem with the ABS it was working..Before we did this test drive i also noticed that the pointer for the petrol is about a half of tank but the yellow light with the gas column was on indicating that there is low fuel.The man from the car house said that this is due to a low accumulator.Can this be the problem or is the problem far worse..Has anyone had this king of problem with an Audi?

Thanks to anyone who helps me because i am very desperate because the car is very very good.