Removing the Old Oxygen Sensor1. Drive your Z3 for about 20 minutes on the highway to bring the engine to operating temperature then park your car. This will let you unscrew the oxygen sensor without possible damage to the threads on the exhaust pipe.2. Shift your transmission into neutral.3. Lift the front of your Z3 with a floor jack, set your car on two jack stands, chock the rear wheels with two chocks and apply the parking brake.4. Put on goggles and crawl under the vehicle. Follow the exhaust pipe connected to the exhaust manifold to the catalytic converter. You will see the O2 sensor...
How to Replace the Audi A4 Ignition Coil
1. Park your Audi A4 on a level surface and open the hood.2. Remove the plastic rivets that secure the plastic engine cover to your engine with the flathead screwdriver. Depending on your engine, there may be either three or four plastic rivets, which are all very obviously placed. Set the engine cover aside.3. Firmly pull the ignition coil you need to replace up from the engine. Since it does attach to the spark plug, you will need to apply a little force. Be sure to pull directly up so that you do not bend the metal rods at the bottom of the ignition coil.4. Unplug the ignition coil...
How to Repair Mushy Auto Brakes
1. Check for a low brake fluid level in the master cylinder reservoir. The fluid level is normally visible through the plastic of the reservoir, and it should be up to the full mark on the reservoir side. On older vehicles with metal reservoirs you have to take the top off and look inside. If the level is low, add new brake fluid to bring it up to the full mark. A low level likely indicates a fluid leak, so carefully inspect the system for signs of leakage. Check all system components for signs of fluid on the outside. Look very carefully at the brake line connections at the master cylinder,...
How to Replace an Alternator on an ML350
1. Disconnect the negative cable from the battery using a wrench to loosen the terminal nut.2. Loosen the belt tensioner with a wrench and remove the accessory belt from the Mercedes.3. Remove the inner liner from the right fender using a wrench to remove the bolts. Unplug the voltage regulator from the alternator. Disconnect the electrical wires using a wrench to remove the nuts.4. Remove the mounting bolts from the alternator with a socket and ratchet. Pull the alternator out of the ML350.5. Put the new alternator in the Mercedes and tighten the mounting bolts with the socket and ratchet....
How to Set a Clock in a 1998 BMW 318I
1. Insert your key into the ignition and turn the key to the first position.2. Press and hold the 'h/DAT' button until the digital clock display begins to flash.3. Press the 'h/DAT' button repeatedly until the correct hour value is shown on the clock's digital display.4. Press the 'min/DAT' button repeatedly until the correct minute value is displayed.5. Press the 'C/F' button to select between the 24-hour and 12-hour time display formats.6. Press the 'SET' button to save your chang...
How to Open the Gas Tank of a 1987 BMW
1. Turn the key of your car to the 'on' position if the gas tank door has not unlocked. Press the unlock door switch. This should unlock the gas tank door.2. Should the gas tank door still not open, open the trunk and pull back the carpet on the side of the fuel tank. Find the 'manual release fuel door button' and press it. Open the gas tank door.3. A gas tank door may be stuck and need lubrication.If the door of the gas tank is stuck, use a flat-head screwdriver to gently pry it open. Feel for the lever that has the door fastened and manually release the lock with the screwdriver. Open...
How to Tell the Difference Between the FSI amp; the TFSI
1. Examine the outside of the Audi for signs that the vehicle is a diesel. If the badges on the back of the car contain 'TDI' or 'Diesel,' the vehicle is not equipped with a FSI or TFSI engine. If the car is missing the badges, open the fuel filler door and look for the word 'Diesel' on the fuel cap.2. Look for the word 'Turbo' or the letter 'T' on the back of the Audi right after the engine size designation. For instance, an Audi A4 equipped with a TFSI engine will have the following badge on the back: '1.8T.'3. Open the car's hood and inspect the vehicle's engine cover. TFSI-equipped vehicles...
How to Replace the Speed Sensor on a BMW 528E
1. Loosen the lug nuts with a lug wrench. Lift the vehicle with a floor jack at the corner of the vehicle where you will be replacing the sensor. Lower the car carefully onto jack stands and ensure that it is supported safely. Finish removing the wheel and set it aside.2. Locate the speed sensor. It has a wiring harness integrated into the end of it and is inserted into the back of the hub from the side facing the wheel well. It may help to clean the area around the sensor with degreaser, a wire brush and a rag to be able to see the sensor better.3. Remove the small Allen bolt that holds...
How to Replace the Radiator in a 2004 Audi A4
1. Turn off the Audi's engine and allow it to sit until the engine and radiator have both become cool. The radiator cannot be removed until the Audi has cooled because the coolant will be hot and may gush from the radiator.2. Empty the radiator by opening the drain plug and draining the coolant into the bucket. Unhook the retaining clip with pliers, then unscrew the metal ring connecting the upper hose to the radiator and allow it to drain of any coolant. Repeat for the lower radiator hose. Check the condition of the O-rings that sit between the radiator hoses and the hose connectors on the...
How to Reset the Oil Light on a 1999 Mercedes E320
1. Insert your key and turn it to the second ("II") ignition position. Wait for the service light to appear.2. Push the bottom button on your instrument cluster (on the left side of the cluster) twice within four seconds.3. Turn your key all the way to the left ("Off"). Push and hold the bottom button. Turn the key back to the second ignition position.4. Continue to hold the bottom button until the service light disappears and resets to the default ("Service in 10,000 miles...
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