Hi, I have recently brought a 2010 Audi A6 Le Mans 170 diesel 2.0 tdi. Since having its cam belt replaced, the car feels a bit heavy (the engine sounds loud) I have also had it serviced using audi/vw apprived oil and all filters. This was the big service. I have been advised to have a vcd done. I don't know what this is? Will it help. Also, all this has been done in the last 4 weeks, and the oil low sign has come up. Your views and advice will be greatly appreciated .