How to Remove A6 Climate Control

1. Turn off the A6's engine. Remove the plastic cover from the battery. Loosen the small nut on the rear edge of the black battery cable with pliers. Pull the cable away to disconnect the battery.
2. Insert the Audi radio-removal keys into the slots. There is one slot beneath the 'Volume' knob and one slot beneath the 'Tune' knob. Push the keys in firmly.
3. Apply outward pressure to the keys to release the radio mounting clips. Slide the radio forward by pulling on the keys.
4. Move the radio out of the way. If you need more room to access the climate control bolts, unplug the two connections from the rear of the radio and set it aside.
5. Remove the two mounting bolts from the top edge of the climate control unit with a socket wrench. Pull the unit forward and unplug its electrical harness.

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How to Reset the E90 Cabin Air Filter Warning

1. Replace the cabin air filter if you have not done so already. Open the hood and examine the passenger side of the engine bay near the firewall to find the cabin air filter housing. The filter extends from one end of the engine bay to the other.
2. Remove the six 8mm bolts from around the cabin air filter housing. Lift the cover off to expose the filter.
3. Remove the old filter and discard it. Insert the new filter, replace the cover and tighten the bolts.
4. Insert your smart key into the electronic ignition. Press the 'Engine Start/Stop' button without placing your foot on the brake (or on the clutch, if it's a manual transmission). Wait for the service warning light to disappear.
5. Press and hold the trip odometer reset button (on instrument panel). Wait for the oil can icon to appear (it will appear after the service triangle) to indicate you are at the service menu.
6. Toggle the indicator stalk until you reach 'Cabin Filter.' Press and hold the 'BC' button at the end of the stalk to reset the interval and turn off the warning display.

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How to Find a Mercedes

1. Talk with people you know who have purchased a Mercedes-Benz. Any friends, family members, co-workers or neighbors who have a Mercedes-Benz may be able to help steer you to a reputable dealer.
2. Utilize the Mercedes-Benz dealer locator online. You can enter something like 'locate Mercedes-Benz dealer' in a search engine on your home computer, or find the Mercedes-Benz website and hover your mouse over the 'Find a Dealer' option in the menu bar. Type your zip code into the search box and click 'Find.'
3. Scroll through the list of Mercedes Benz dealers near you to find the closest one. You can change the search radius by increasing or decreasing the mileage in the drop-down menu. You can click on dealership names for more information such as additional contact information, hours of operation and a link to the dealer's local website.
4. Consider checking with the Better Business Bureau to determine if any Mercedes-Benz dealers in your area have dramatically more complaints registered with BBB than other dealers in the area. Substantially higher rates of complaint might be reason to view certain dealers warily. A complaint or two, or possibly even a handful, is probably not enough to discourage you, considering that auto dealers in general are not entirely viewed with a great deal of goodwill by the American consumer base.

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How to Upgrade the Audi A8 Navigation Disc

1. Go to Navigation.com, and use the menus on the left to select 'Built-in, Factory Installed,' then 'Audi' and A8/A8L/S8.' Select your car's year, and the current update is shown.
2. Click 'Add to Cart' and 'Checkout.' Enter your payment and shipping information so the update may be mailed to you. The update is sent on a DVD.
3. Insert the new DVD into the navigation system and wait for the update screen to appear. Enter the authorization code provided on the DVD case, if prompted to do so. Wait for the update process to complete, then eject the DVD from the system. The new maps are now ready to use.

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How to Repair a 2003 BMW

1. Locate the OBD-II port located underneath the steering column on your 2003 BMW. If you are unable to locate the port on your own, consult your vehicle's owner's manual.
2. Plug the code scanner into the OBD-II port, then turn on your car's ignition so the engine is idling and the electrical system is activated.
3. Watch the display on the code scanner as it scans for any error codes that your onboard diagnostic system may be outputting. Note these codes and bring them to your local auto parts store or BMW dealership who can de-code them for you and tell you what in your 2003 BMW is failing.

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How to Bleed Air Out of a Mercedes Diesel Engine

1. Open the hood and locate the hand operated prime pump. It's on the primary pump on the right-hand side of the engine bay.
2. Unscrew the handle of the pump by hand in a counterclockwise motion.
3. Work the pump handle up and down until you feel a resistance and you can hear air escaping from the injection pump.
4. Push the pump handle back into the pump and twist it in a clockwise motion. Do not over-tighten the pump handle.
5. Crank the starter to expel any remaining air in the fuel system. Do not crank the starter for more than 30 seconds at a time to keep from damaging the starter. Wait for the starter to cool before resuming cranking.
6. Follow the subsequent steps if the engine will still not start after several attempts at cranking the engine.
7. Loosen the attaching nuts of the fuel injectors on the cylinder head with a 17mm combination wrench in a counterclockwise motion. Do not remove the nuts.
8. Crank the engine until fuel seeps out of the loosened fuel injector nuts.
9. Retighten the fuel injector nuts with a 17mm combination wrench in a clockwise motion.
10. Start the engine and allow it to run a few minutes so that any remaining traces of air are expelled from the fuel system.

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How to Replace a Thermostat on an Audi 2.8

1. Place a floor jack under the transmission cross member and jack the front of the Audi off the ground. Place a jack stand on each A-Arm and lower the vehicle onto the jack stands. Make sure the emergency brake is in place or a wheel chuck is placed behind the rear tires to prevent the vehicle from rolling backwards while you work on it.
2. Place a drain pan under the petcock of the radiator and drain the radiator fluid into the pan. Depending on the age of the Audi, the petcock may be hard to open due to exposure to road dirt and salt over the years. Use a pair of pliers but be cautious as the valve easily breaks if excessive force is used. Once the fluid drained, close the petcock.
3. Trace the lower radiator hose from the radiator to the location where the hose connects to the engine. The location is to the right of the engine crank and may be difficult to see from under the vehicle. Depending on your comfort level, you may want to complete the rest of the job from the top of the engine, not the bottom.
4. Remove the radiator hose from the thermostat cover by squeezing the two metal tabs located together on the retention band clamp. A pair of needle-nose pliers is suggested for this task. With the tabs squeezed together, pull the radiator hose off the cover.
5. Remove the two bolts that secure the cover to the engine block with a boxed-end wrench. Unfortunately, there is not enough room for a ratchet. To remove the bolts, make short quarter turns of the wrench, as that is all that is possible in the limited space. With the bolts removed, pull the cover off the engine block.
6. Remove the gasket O-ring that fits into the bottom of the thermostat cover. If the cover does not have an O-ring, inspect the engine block for it. It sometimes sticks to the engine block.
7. Pull the thermostat out of the engine block. Take note that the end with the pin sticks out of the engine block. Place the new thermostat into the engine block so it sticks out in the same manner.
8. Place the thermostat cover back over the thermostat and thread the bolts in as far as you can with your fingers. Tighten the bolts with a boxed wrench.
9. Reattach the lower radiator hose to the thermostat cover. It helps to slide the clamp backwards on the hose and then push the hose onto the cover without the clamp. Then use the pliers to squeeze the tabs and slide the clamp into place.
10. Fill the radiator with a 50/50 mix of radiator fluid and distilled water.

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How to Install a CD Player With a Factory Amp

Factory amp interface
1. Locate the amplifier signal wires. In European vehicles, these wires are often labeled on the factory radio itself. For most domestic vehicles, these wires are the same wires that feed the speakers on models that are not equipped with a factory amplifier. In addition to signal wires, you must locate the amp turn-on wire. This is the wire that tells the amp to turn on when the stereo is on.
2. Cut the ends off a set of RCA cables. Plug the RCA cables into the RCA pre-outs on the back of the stereo to be installed. Strip back about 1 inch of insulation from each cable and separate the center conductor from the ground shield.
3. Connect the RCA plugged into the front left RCA output to the front left signal wires to the amplifier. Connect the center conductor to the positive wire, and the shield conductor to the negative wire. Repeat this for the front right, rear left, and rear right signal wires.
4. Solder all connections, and seal with electrical tape or heat shrink tubing. Connect the remote turn-on wire from the CD player to the turn-on wire for the amplifier. Usually, the CD player's remote turn-on wire is blue with a white stripe.
5. Turn on the CD player and listen. If connected properly, you will hear music playing through all four speakers and subwoofer (if equipped). Start the car and turn the volume all the way down to check for noise. With the volume set to zero, no sound should be heard. If a high-pitched whine is heard, and the frequency increases when you press the gas, check for a proper ground connection on the CD player and the signal wires.

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How to Replace an ABS Speed Sensor in a BMW

1. With the car in park, pop the hood and disconnect the battery cables with the appropriately sized socket wrench.
2. Jack one side of the car up and use the lug nut wrench to remove the lugnuts on one wheel. Pull the wheel off, reach in behind the wheel column, and locate a small black box. Use the socket wrenches to remove the mounting screws on the edges of the box and slide it around to look at the underside of the box.
3. Pull the tabs on either side of the small round speed sensor and disconnect the wiring harness underneath. Pull the ABS sensor free and then place the new sensor.
4. Reattach the box and mounting screws on the back of the column and then replace the wheel. Repeat Steps 1 through 3 on the remaining wheels that have bad ABS sensors and then take the car for a test drive to make sure the sensors are working.

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How to Repair an Air Mass Sensor in the Engine of a Mercedes

1. Open the hood of your Mercedes and locate the mass air flow (MAF) sensor, mostly found between the air cleaner box and the air intake pipe of more modernized engines.
2. Unfasten all of the clamps that hold the air filter box to the intake hose and disconnect completely. Remove the air filter inside and thoroughly clean this area of any dirt that may have built-up over the extensive use of your Mercedes. This step is not imperative to removing and replacing the MAF sensor, but it will certainly help improve the functionality of the new sensor once installed. Replace the air filter if necessary, but leave the air box disconnected at this time.
3. Use the necessary socket to remove the bolt that holds the clamp of the air intake pipe. Remove this piece to free the intake pipe.
4. Pinch both sides of the MAF sensor and wiggle free until you have completely removed this part from the engine. Be patient, as this may take a few moments of your time to loosen.
5. Compare the old MAF sensor that you just removed with its replacement counterpart. Make sure both sensors match identically and replace the new MAF sensor exactly as the new one was removed. It should slide on very easily, with little wiggling to set into place.
6. Reconnect all of the parts that were removed to access the MAF sensor and clean the air filter box. Make sure all bolts are tightened properly to hold the intended clamps together, ensuring that the air intake tube and air filter box both are set exactly as they were before removal and installation of the MAF sensor.

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