How to Remove Mercedes C300 W204 Air Filter Housing


1. Open the hood of the car. Grasp the sides of the smaller engine cover in the front of the engine compartment and pull up to disengage the clips. Work around all four edges to release the cover, then set it aside.
2. Disconnect the air hose running to the rear engine cover. Pull up on the cover, working around all four edges. Turn the cover upside down to access the two engine air filters.
3. Pull the air filters out of the mounting area. Slide the replacement filters into place. Push the rear engine cover into place until the clips lock. Align the front engine cover and press it into place.
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How to Replace the Cabin Air Filter on a CLK 320


1. Park the Mercedes Benz CLK 320 in a safe work area.
2. Open the passenger's side door and squat down beside the driver's side door. Shine a flashlight underneath the glove compartment and locate the access panel directly under the glove box. Remove the screws from the access panel with a screwdriver. Place the screws in a safe area, such as on the driver's seat.
3. Pull down the access panel and place it in the driver's seat. Shine the flashlight through the access panel opening and locate the black square box directly behind the glove box. The black square box houses the cabin air filter and has a sliding bracket on top.
4. Pull the front part of the sliding bracket toward the passenger's seat and push the adjoining sliding bracket toward the front of the vehicle. This will expose the cabin air filter. Grab the lower back part of the cabin air filter and rotate it downward until it comes out of the box. Make a mental note of the direction of the air flow arrow on the old cabin air filter.
5. Install the new cabin air filter with the air flow arrow pointing in the same direction in which the arrow on the old filter pointed. Slide both sliding brackets back toward each other to close the top of the square box over the top of the new cabin air filter.
6. Reassemble the bottom access panel with the removed screws, and tighten the screws with the screwdriver. Discard the old cabin air filter.
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How to Buy a BMW


1. Decide on the style of BMW you would like. They offer sedans, SUVs, sports wagons and coupes. If you aren't familiar with all the options BMW has to offer, visit their website to check out all the models available and the features they include.
2. Make a list of the features and options that are the most important to you. If you have a lot of custom features you would like to have, consider custom-ordering your BMW and having it delivered to a dealer near you. This option is available both on the website and at a BMW dealer.
3. Choose the top three models you are interested in and do more research. The BMW 650 series is rated negatively as having a rough ride, jerky transmission and throttle problems. The BMW X5 is rated as one of the most luxurious SUVs and has a V8 under the hood that is popular with many car owners. These are important things to know about each of the models.
4. Consider the warranties offered by BMW. The manufacturer offers a 12-year warranty for the bodywork, three years for the paint and an entire automobile warranty that covers original BMW parts and accessories for 2 years regardless of mileage, but not including replacement of worn parts.
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DIY Mercedes Benz Diagnostic Testing


1. Open the Mercedes' driver-side door and take a seat behind the steering wheel. Start the vehicle's engine. All the dashboard lights will momentarily come on and then switch themselves off. Look for any warning lights that remain lit. These indicators will tell you what parts of your Mercedes need troubleshooting. For example, an active 'service engine' light means the Mercedes' OBD-II system has detected malfunctions. An Anti-Lock Brakes light means there is a problem with the brakes.
2. Turn the engine and the electrical system off. Leave the key in the Mercedes' ignition.
3. Look into the leg-space beneath the steering wheel. There, you will find a 16 pin-receiving computer outlet. This Data Link Connector accommodates scanners for all diagnostic systems. However, this outlet's location depends on the year and model of the Mercedes in question. For most vehicles, it will be under the dash and to the left or right of the steering column. In some models, it will be behind an access panel, and in others, it will be out in the open.
4. Connect your diagnostic hardware to the Mercedes' DLC outlet. Switch the device on. Most scanners come with a diagnostic cable, which connects the scanner to the DLC. Some devices may plug directly into the DLC.
5. Turn the key in the ignition to the 'On' designation. This will bring the electrical system up. Depending on the system and the scanner brand you are working with, you may need to turn on the engine. If your scanner will not become fully operational otherwise, you will need to start the Mercedes.
6. Enter a code-retrieving command. How to do this depends on the exact device you are using. Configuration, orientation, and programming differs by the brand and system being used. It is a lot like how operating systems are different by brand of cell phone or laptop. Consult your hardware's user's manual for precise instruction. Once the codes have been retrieved from the system, they will appear on the scanner's display screen.
7. Look up coding definitions. Some device manuals will contain such definitions in the rear, as an appendix. If the manual doesn't contain diagnostic coding information, you can find further information online. OBD-II and ABS codes, for example, are relatively easy to find. Some of the more complex systems, like SRS air bags, will be a little more difficult and may require a technical source book.
8. Look up definitions that correspond with all the codes you copied from the scanner. These definitions will help you make an informed decision. You can either troubleshoot and repair the problems yourself or drive the Mercedes to a mechanic. If you lack experience with the highly complex systems, like ABS brakes or SRS air bags, seriously consider involving a repair garage. Your code list will save you money in diagnostic fees.
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How to Change amp; Replace the Antenna Mast on a 1994 Mercedes S500


1. Loosen the nut securing the antenna mast to the driver side rear quarter panel, near the trunk lid, using an adjustable wrench.
2. Switch the vehicle's ignition on and turn on the radio. Quickly pull out the antenna mast and attached nylon cord from the rear quarter panel, while the power antenna motor attempts to extend the mast. The operation of the power antenna motor only lasts for a few seconds.
3. Shut off the radio and quickly make your way to the rear of the vehicle. With the power antenna motor running, hold the bottom metal portion of the new antenna with one hand, while feeding the attached nylon cord into the mounting base, located on the rear quarter panel.
4. Continue feeding the nylon cord into the mounting base, using a twisting motion, until the power antenna motor successfully pulls the nylon cable in automatically. Secure the new antenna mast to the base, using the supplied nut and an adjustable wrench.
5. Switch the vehicle's ignition off to finish the installation process.
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How to Reset the Check Light in a BMW


1. Create a grounding apparatus for the diagnostic connector. Attach the copper clip to the large end of the insulator. Connect the copper wire to the skinny part of the insulator. Connect the other end of the wire to a banana plug. Connect the wire on the BMW pin to the other side of the banana plug.
2. Turn the key in the ignition half way so that the lights come on but the engine is not running.
3. Open the hood and locate the ground plug in the electrical system near the engine. It is usually a small octagon shaped screw or nut close to the data link connector. Attach the open side of the copper clip to the ground plug.
4. Locate the data link connector and unscrew the cap exposing the pins underneath. Press the end of the male pin into the number 7 plug inside the data link connector. This is usually the middle right hole on a 15-point connector and the very bottom hole on a 20-point connector. Hold the pin in place for three seconds to reset the oil light, and nine seconds to reset the inspection light.
5. Remove the pin once the light resets. Screw the cap back on. Turn the engine off, then turn it back on. If the lights are still there, try resetting the lights again. Once the lights remain off, turn off the engine and close the hood.
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How to Upgrade an Audi


1. Select the wheels. Many companies manufacture wheels for Audis, so there are many choices. Companies such as BBS make very high quality wheels, or you can use OEM wheels from a different Audi model. If your Audi is not an S model (S4, S6, RS4, for example), then installing a set of larger wheels from one of these models is a way to upgrade the wheels and retain a factory appearance.
2. Purchase the proper tires. When selecting tires, take into account what you will be using your Audi for. If you do a lot of driving in the snow or rain, an all-season tire is the best choice. On the other hand, if you live in a warm climate, an ultra-high-performance summer tire will provide impressive handling. Have a professional tire shop install the tires.
3. Park the car on a flat, level surface if you are replacing the wheel and tire package yourself. Loosen the lug nuts for the wheels with a lug wrench. Use a floor jack to lift the car and lower it onto jack stands. Finish removing the lug nuts and the old wheel. Wipe down the hub mounting surface with a rag and degreaser.
4. Slide the new wheel and tire onto the hub, ensuring that it is fully seated. Thread on the lug nuts and tighten them with the lug wrench. Lower the Audi back to the ground. Finish tightening the lug nuts progressively in a crisscross pattern to 90 foot-pounds. Finish installing the remaining three wheels. Check the tightness of the lug nuts after the car has been driven 100 miles.
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How to Change the Fan Belt on a 1992 Mercedes SEL 500


1. Open your Mercedes' hood so you can access the belt. Be sure the engine is cool before operating.
2. Loosen every bolt in the series that binds the belt into place. Take special care to remember the pattern in which the fan belt is attached. This is the same pattern you'll follow to route the new fan belt. Do not remove the bolts, simply loosen them so that the belt looses tension at each point.
3. Pull the belt out of each connection, making sure you leave it intact so that you can compare it to the new belt.
4. Stretch the old and new belts out completely with both hands. Compare the size of each belt to make sure the new belt will fit your Mercedes' engine.
5. Route the belt along each pulley, following the pattern you took note of when loosening the tension. Press down with a free hand after connecting the belt to each pulley so that you continuously create tension in the belt.
6. Tighten the belt at each point along the pattern by turning the bolts hard to the right, which will hold the belt in place.
7. Clean your workplace and put away all tools. Discard of the old fan belt.
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How to Turn Up Boost on a 1.8T


1. Remove the stock turbo-to-intercooler pressure tube by loosening the clamps that secure it to the silicone rubber connector on top of the engine. Slide the tube out of the connector and lay it off to one side so that you have easier access to the stock N75.
2. Identify the N75. The valve has a three-way fitting on the bottom, which has a 90-degree rubber elbow and corrugated vacuum line connected to one side and an angled, molded-rubber line secured with a hose clamp on the other. The corrugated line is clamped to the plastic intake tube just before the flex portion. Turn the N75 to expose the round top and the wiring harness attached there. Unplug the harness.
3. Grasp and remove the hose clamp on the bottom of the N75 where the short section of tube connects to the intake. Pull on the valve to release it. Cut the non-reusable hose clamps off the other two rubber lines using either a pair of wire cutters or a hobby-style rotary tool. Be careful not to nick the hoses.
4. Install the new N75J J valve in the exact orientation as the old N75, with the longer of the two side-facing fittings facing toward the intake tube. Use new hose clamps to replace the non-reusable units on the two previous hoses. Re-attach those two hoses, grasp the first hose clamp with pliers to release the pressure and slip the last fitting into it.
5. Slide the intercooler tube back into the rubber connector and tighten the hose clamp. Reconnect the wiring harness plug to your new N75J valve.
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How to Clean the Throttle Body in the Audi A4


1. Remove the air duct tube from the throttle body. You will need to unscrew the hose clamps to remove the tube.
2. Spray throttle body cleaner onto the throttle body, both inside and out. Allow it to liberally cover the throttle body and butterfly valve but avoid the throttle body sensors.
3. Wipe off the throttle body cleaner using a clean rag. Use a toothbrush to get the smaller areas that the rag cannot easily reach.
4. Repeat Steps 2 and 3 until the Audi's throttle body is completely clean.
5. Reattach the air duct hose and tighten the hose clamp.
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