How to Change a Cabin Air Filter


1. Locate the cabin air filter access cover. Typically it is found under the hood at the very back of the engine compartment, or under the dash on the passenger side.
2. Using your screwdriver, unscrew the cover and remove the old cabin air filter.
3. Compare the new cabin air filter to the old one to make sure it is the proper size.
4. Set the old cabin air filter aside.
5. Using your rag, wipe out the cabin air filter compartment to remove remaining dirt and dust.
6. Place the new cabin air filter in the compartment, pressing down and side to side to ensure proper fit. Some filters have a foam gasket on the underside; make sure the filter is installed correctly.
7. Replace the cabin air filter access cover.
8. Wipe yourself and the area clean with rags.
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How to Change Audi TT Headlights


1. First, select the new headlights you want to install. The Audi TT can use a high-intensity discharge (HID) bulb or an light-emitting diode (LED) package. Choose which one you want from an auto parts store.
2. To access the headlights, you must pop the trunk and remove the headlights from behind the casings. Open the trunk and find the back of the headlight wires. These should feed right into the middle of the headlight assembly.
3. Loosen the securing screws around the headlight connection. The connection is a small plastic piece at the end of the wires. Some twisting and maneuvering may be needed to get at the screws. Loosen all the screws but do not completely remove them.
4. Once the screws are loosened, twist the headlight connector until it pulls freely out of the headlamp case. The bulb and connector will come out together.
5. Release the headlight bulb from the connector by depressing the clip or attachment (some models may have different types of clips) and pull out the bulb.
6. Insert the new bulbs by sliding them into the connectors. Replace the bulbs in the headlamp. Turn and lock them in place behind the screws, then tighten the screws to secure them.
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How to Change the Timing Chain on a 525I BMW


1. Buy a timing chain that is made specifically for the BMW 525i 2.5L engine. Most auto parts store or online vendors carry the timing chain needed. Lift the hood of your vehicle and disconnect the negative battery cable. Remove the vibration damper and hub assembly to reach the upper and lower timing case covers. Remove case covers. Refer to the vehicle service or owner's manual to identify vehicle parts.
2. Use a ratchet and pinch the upper timing chain tensioner to hold it in place. Use a wrench to remove the upper timing chain sprockets. Remove the camshafts that run along the side of the timing chain. Loosen bolts holding the upper timing chain guide in place. Remove the timing chain and upper timing chain guide. Remove the ratchet holding the upper timing chain tensioner. Remove the crankshaft sprocket and tensioning rail if necessary. Remove the Woodruff key.
3. Install the new timing chain. Replace the Woodruff key and reattach the crankshaft sprocket and tensioning rail. Reattach camshaft sprockets and tighten bolts using a wrench to 16 foot pounds (22Nm). Reattach and tighten lower timing cover bolts to 6.5 to 8.0 foot pounds (9 to 11Nm). Reattach the vibration damper hub bolt and tighten to 17 foot pounds (23 Nm).
4. Replace the upper and lower timing case covers. Start the engine to make sure the timing chain is installed properly.
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How to Change the Brake Lights on an Audi


1. Open the trunk and pull back the carpet in the cargo luggage area.
2. Locate the nuts holding the brake light housing cover. Remove these nuts with a socket wrench.
3. Remove the housing cover and disconnect the electrical wiring from the bulb housing.
4. Turn the bulb counterclockwise to unlock it from the housing. Pull the bulb straight out of the housing.
5. Install the new bulb, reassemble the housing and replace the carpet in the trunk. Installation is the reverse of removal.
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How to Buy a BMW 3 Series


1. Go to the BMW USA website to familiarize yourself with the 3 Series and its options. Choose the '3' from the top of the page; click on the body style and level you wish to pursue. Keep in mind that the xDrive models offer standard all-wheel-drive, other options offer standard rear-wheel-drive.
2. Click on 'view model highlights' to view the level's standard features. Doing this saves you time at the dealership, as you'll become knowledgeable of which level you want. View 'features and specs' from the left side menu at anytime to see a break down of specifications and standard level features.
3. Click on the 'build your own' option. From here, you can build the 3 Series as you see fit. At the same time, you can view pricing for a variety of tempting luxury options. Once you're done building the vehicle, click 'print' from the right side menu so that you can use the information for shopping purchases.
4. Click 'estimate a payment' once building is complete. Choose your state from the drop down box and whether you'd prefer to lease or finance from the 'options' boxes. Options are already filled out and calculated payments do not include taxes or fees.
5. Change the down payment amount if you would like. You can also change the rate, although the rate listed is one offered as a special rate from BMW Financial Services. If you do not plan to use BMW's special offer, change the rate to one you see fit (you can check your bank's website for current new-car auto loan rates).
6. Apply online through BMW Financial Services by clicking 'apply online for finance,' if you'd prefer. Otherwise, you can contact your bank for a pre-approval to have handy when you visit the dealership. The credit application you submit from the BMW website is forwarded to a local dealer of your choice--you are asked to choose a dealer before submitting.
7. Contact the local BMW dealership you want to use once you have your pre-approval. Make an appointment or stop in with your 3 Series print-out. Ask to test drive the model you want and find the one you want to buy, whether it is the one you built or a different model built to suit your needs if you've decided on a different level.
8. Tell the BMW consultant that you have a pre-approval. If it's from a bank other than BMW Financial Services, the consultant will provide you with the information that you'll need to retrieve your check, such as the vehicle identification number (VIN) and buyer's order, which lists all pricing and total finance amount. If financing through BMW Financial Services, the dealer will have your approval on hand and will be able to complete your loan paperwork when you are.
9. Bring the buyer's order to your financing bank to complete your paperwork. Whether financing through the dealer or independently, you'll need to provide your driver's license, vehicle registration (if transferring plates), most recent paystub and proof of residency, such as a recent utility bill. Give the check to the dealer upon return for pick up, or simply sign all paperwork at the BMW dealership. Provide any down payment at this time.
10. Sign all of your state's required motor vehicle department forms, as the dealer handles all insurance, plates, taxes and registration paperwork, even if financing independently. Your consultant will explain your vehicle's options and features entirely, secure your plates and provide you with any additional vehicle or state information before you leave in your new 3 Series.
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How to Refresh your XM radio signal


1. Turn your XM radio on. Position the antenna -- if a standalone receiver -- facing skyward. If you are refreshing an in-car unit and you park the vehicle in a garage, pull the vehicle out of the garage.
2. Tune your XM radio receiver to station '0' and observe as an eight-digit, alphanumeric code appears on the screen -- this is the XM radio's ID. Notate this ID. Please note that SiriusXM does not use the letters 'I,' 'O,' 'S' or 'F' in radio IDs.
3. Tune your XM radio to channel '1.'
4. Log onto the internet and direct your browser to the SiriusXM website.
5. Place the pointer over the 'Help & Support' link on the top, right of SiriusXM's website, and click 'Refresh My Radio.'
6. Type your XM radio's ID in the text box labeled 'Radio ID (ESN or SID),' and click 'Send Activation Request.'
7. Wait approximately five minutes as your radio's signal refreshes. A message on the display alerts you when the refresh is complete -- the exact message varies, depending on the style of receiver.
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How to Reset the Brake Warning Light on a 2001 BMW 325Ci


Resetting the System
1. Sit in the front seat of your 2001 BMW 325Ci. Keep the driver's door open.
2. Insert your keys into the ignition.Turn your keys two clicks clockwise to the number '2' position to turn your BMW 325Ci's system on without starting the engine.
3. Keep your keys in position '2.' Wait 30 seconds to allow your dash lighting system and vehicle computer to adjust. Press your foot on the brake pedal.
4. Turn your BMW 325Ci off so that the system can register repairs that have occurred since your brake warning light first appeared.
5. Turn your keys all the way clockwise in the ignition to restart your 2001 BMW 325Ci. View your dashboard lighting system. Check to make sure the brake warning light is off to ensure that your system is reset.
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How to Tell If an Audi Has Servotronic


1. Open the driver's door and locate the fuse panel on the left side of the dashboard.
2. Insert the flat screwdriver into the small slit on the fuse panel and pry it loose.
3. Look inside the fuse panel, behind the fuse box, for the Servotronic module. It will be marked with a '638' stamp or 'Servotronic' marking. If the module is not there, then your Audi does not have Servotronic.
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How to Replace the Alternator in a Mercedes Benz


1. Examine the drive belt configuration. The Mercedes Benz line of vehicles uses a serpentine belt (one long belt) to power the alternator and a series of other electrical components. Note the orientation of the belt. There is a belt diagram on the underside of the hood and on the frame of the Benz next to the hood latch (on some models).
2. Release tension on the alternator belt. Turn the center tension pulley clockwise with a socket wrench. This will create slack in the belt.
3. Slide the belt off the alternator. You will need to remove the belt from all of the other components on the system as well.
4. Remove the electrical connector on the back of the alternator.
5. Remove the top and bottom alternator mounting bolts and slide the alternator out of the engine bay.
6. Install the new alternator. Installation is the reverse of the removal process. When installing the belt, it is best to use a new one. They're relatively inexpensive for the Benz and by the time an alternator needs to be replaced, the belt is usually worn to the point where it will likely need to be replaced soon as well. Make sure that the belt sits directly in the center of the pulley, and that the teeth on the belt sit in the pulley's grooves. Route the belt according to the belt path on the underside of the hood.
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How to Reset a Fuel Gauge


1. Turn the ignition switch to the 'On' position.
2. Press the 'Odo/Trip' button until the odometer is put into 'ODO' mode.
3. Turn off the ignition.
4. Press and hold the 'Odo/Trip' button. Turn the ignition switch to the 'On' position. Hold the 'Odo/Trip' button for two seconds. Release the 'Odo/Trip' button and then immediately press it again, release it, press it, release it and then press it and hold it. Hold the button until the leveling information is displayed on the odometer, about five seconds.
5. Release the 'Odo/Trip' button.
6. Press and hold the 'Odo/Trip' button until the odometer display reads '1', which indicates the reset process has begun.
7. Release the 'Odo/Trip' button when the reset process is complete, which is indicated when the odometer display returns to normal.
8. Turn off the ignition.
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