after looking over my 2.5 v6 cd prefacelift which i bought for £100 im now in a quandry on where to start with servicing this car,faults i have found so far are ,engine management light constantly on,previous owner used it like that for 6 months said something about having the rocker cover gasket changed and light didnt reset i got a constant brake pad warning on in display ,i have no manual for this car so no instructions on how things work,i get a red dome on my sunroof facia which i assume is an infra red receptor,yet i only have one key,the car runs like and sounds like a bag of shit,mainly misfires and exhaust noise ,how the hell do you access the dis unit and occasionally i get a smell of petrol into the cab but cant see any signs of leakage at the union,is owning an omaga worth all this or do ijust give up at the first hurdle,all advice greatly appreciated as this car has the engine in the wrong way and two extra plugs lol