Why won't my Audi A4 S-Line's heater produce warm air?

I have an Audi A4 S-Line on a 55 plate. The heater is now blowing out cool air. Can you help? I've had the air conditioning on most of the summer.

Which Audi A6 models have a chain cam?

Do any Audi A6 models up to five years old have a chain cam?

Why is my Audi A4 hesitating under acceleration?

I have an Audi A4 TDI. When I put the boot down in second or third gear between 1000 and 2000 revs, the engine splutters as the turbo is working. It's like a dirty fuel filter but I know it's not, as it...

My Audi A3 is losing power and misfiring - what's wrong with it?

I've got an Audi A3 TDI 2-litre. It suddenly started misfiring and jerking while I was on the motorway. Now its got worse and is losing a lot of power. It sounds like a tractor. I have to rev it very high...

Which four-wheel drive hatchback/estate for a 120-mile commute?

Which four-wheel drive diesel hatchback or estate which returns 50+mpg and is suitable for a 120-mile round commute across northern hills would you recommend? I've seen the Audi A3 Sportback quattro, or...

My Audi A3 was supplied with 'bump stops' still fitted and has been damaged. Should the dealer repair the damage?

I have an Audi A3 which I bought new in 2007 and now has done 19,000 miles. The car has recently developed a noise at the front, so I took it into an Audi dealership for investigative work. They discovered...

I need to replace my Skoda Octavia with something to cover high mileages - what about the Toyota Avensis diesel?

I run my own furnishing business and cover about 50,000 miles per year. I currently have a 2006 Skoda Octavia Mk2 1.9TDI estate which is coming up to 165,000 miles. It has been very good, but the driver's...

What's causing my Audi A4 to misfire?

My Audi A4 recently developed a misfire on number two cylinder. I've replaced the spark plugs but that didn't resolve it. I checked the coil pack and leads, and they seem ok. I even changed the injectors...

Audi A5 coupe quattro or BMW 330 xDrive?

I'm in the process of choosing my new car. I definitely want a four-wheel drive because I like to drive to the mountains in wintertime. My primary concern is great handling of the car for fast cornering....

Is there a fault with my Audi A4's start-stop system?

I believe I have a problem with my Audi A4 Avant B8's start-stop system. Whatever I do, including switching everything including radio, lights and climate control off, I cannot achieve more than 25 seconds....