What is error code 01798 on Audi a6?

How do do I determine if my 1986 Mercedes 190e has a 16 valve engine? Where is the thermo fan switch on 2003 VW Jetta? Do Lamborghini car's have ac? How fast is 75 kilometers? What happens if timing belt breaks on vw sharan 2.0 petrol? Why is Mercedes 300e stalling? Where is the head quarter of BMW? Is Peugeot 106 considered vintage? What was the most important crop in Europe introduced from the Americas? Why is their sludge in the breather of my vw polo air filter? How do you remove windscreen washer bottle in astra 1.4 2000? Why do you get vibration at 2500 revs corsa diesel1.7? Can you bypass a fuel pump relay? Will Jaguar xjs wheels fit on Jaguar xj6? What is the function of sensor at Peugeot 406 power steering pressure hose? How do you remove the passenger side door mirror on a citroen saxo to replace it? If Have a 2004 BMW 745 LI where do to go to get the mileage reading? How fast are CO2 dragsters? How do you remove ecu unit megane? How much does a mini lamborghini cost?