Cars Comp

1. Park your Audi TT on a level surface, and pop the cars hood.
2. Remove the plastic engine cover that surrounds the oil filler neck to reveal the coil packs. Remove any plastic screws securing the engine cover in place using your flat-blade screwdriver.
3. Position the head of the screwdriver underneath the top of the coil pack, pressing down on the screwdrivers handle to pry the coil pack loose. Once you have loosened the coil pack, gently pull it up and out.
4. Press down on the plastic notch at the base of the coil packs connector, and pull the coil pack out of the wiring harness.
5. Insert the new coil pack into the wiring harness, and gently slide it back down on top of the spark plug. Press and click it into place to secure it.
6. Repeat steps 4 and 5 on any other coil packs you plan to replace.
7. Reinstall the plastic engine cover and close your hood to complete the procedure.

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1. Open the hood and locate the belt routing diagram. The routing diagram for the 1990 Mercedes 300Sl is located on the fan cover. This diagram will be needed to install the new engine belt.
2. Remove the fan cover by unscrewing the screws on both sides of the cover with a flat-head screwdriver. Pull the cover off and place it on the ground.
3. Locate the spring-loaded belt tensioner on the front of the engine. The tensioner device for the 1990 Mercedes 300Sl models is located on the front center of the engine. Use the bolt in the middle of the tensioner device pulley to rotate the tensioner.
4. Rotate the tensioner pulley counter-clockwise with the breaker bar and a metric socket. Then, slide the belt out from around the tensioner pulley. Release the tensioner and remove the breaker bar.
5. Slide the belt out of all of the accessory pulleys and out of the engine area. Then, slide the new belt into the engine area and around each accessory pulley as instructed by the routing diagram.
6. Rotate the tensioner device pulley counter-clockwise again. While holding the tensioner over with one hand, slide the belt around the tensioner pulley with the other hand. Release the tensioner and it will tighten the belt as it retracts. Inspect the belt to make sure that it is fully seated in all accessory pulleys.
7. Crank the 1990 Mercedes 300Sl and inspect the belt as it travels around the moving pulleys to make sure that it remains seated with the motor running. Then, turn the motor off and reconnect the fan cover back over the fan. Close the hood.

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1. Pop the hood on the car and make sure the engine is completely cool before you start. Even a slightly warm engine could result in serious burns. Disconnect the negative cable on the battery using a wrench to loosen the nut on the terminal. Place a drain pan under the radiator and drain the engine coolant by opening the valve on the bottom of the radiator with a wrench. Remove the engine undercover using a screwdriver.
2. Note the proper routing of the accessory drive belt and remove it by turning the idler pulley counter clockwise using a wrench. Remove the power steering pump using a wrench. Remove the secondary air pump and the bracket using a wrench to remove the bolts. Disconnect the radiator hoses using the screwdriver to loosen the hose clamps.
3. Unplug the wiring harness from the radiator fan. Place the wheel chocks behind the rear wheels of the Quattro. Lift the front end of the car using the automobile jack. Place a jack stand under the Audi near the jacking point and raise it to the frame. Remove the bolts from the mounting brackets using a wrench. Lower the radiator and fan together from the Audi.
4. Remove the fan unit from the old radiator and connect it to the new one. Install the radiator and fan unit together from the bottom of the car. Mount it in place by tightening the bracket bolts with a wrench. Remove the jack stand from under the Audi and lower the car to the ground. Plug the wiring harness into the fan unit.
5. Connect the radiator hoses and tighten the hose clamps with the screwdriver. Install the secondary air pump and brackets and secure it using a wrench. Install the power steering pump and tighten the mounting bolts with a wrench. Reinstall the accessory drive belt and tighten it by turning the idler pulley clockwise with the wrench.
6. Install the engine undercover using a screwdriver. Connect the negative battery cable and tighten the terminal nut with the wrench. Refill the radiator and reservoir with fresh engine coolant. Start the Audi and check the system thoroughly for leaking.

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1. Position the car ramps behind the vehicle and back up onto the ramps slowly. Place the tire stops in position behind the front tires to secure the vehicle from moving during the replacement.
2. Lift the vehicles hood and locate the fuse panel. Remove the bolt securing the panel using the crescent wrench. Remove the fuse responsible for controlling the fuel pump.
3. Find the fuel filter under the rear of the vehicle near the fuel tank. Position the floor jack below the fuel tank in preparation of lowering the tank. You will only be lowering the fuel tank about four inches. Using the crescent wrench, remove both metal holding straps that secure the fuel tank in place.
4. Using the floor jack, lower the fuel tank about 4 to 6 inches to gain full access to the fuel filter. Use the crescent wrench to remove both fuel lines going into the fuel filter. Remove the securing bolt and remove the old fuel filter.
5. Install the new filter and replace the securing bolt. Reattach both fuel lines ensuring the arrows on the filter are pointing toward the front of the vehicle. Using the floor jack, lift the fuel tank back in place and reattach the metal holding straps.
6. Reinstall the fuel pump fuse and reattach the bolt that secures the fuse panel. Remove the tire stops and start the vehicle. Drive the vehicle off the car ramps.

Taking the Old Brakes Off
1. Empty the brake fluid from the vehicle. The fluid is corrosive and can cause serious problems if it starts to leak unexpectedly.
2. Use a breaker bar to loosen the wheel bolts on the first wheel. Do notremove them yet.
3. Jack up the front of the vehicle, using jack stands to help support the axle and frame
4. Loosen the rotor-retaining screw on either side of the BMW. Do not remove them yet.
5. Remove the retaining clip with a flat-head screwdriver and set it aside.
6. Remove the protective caps over the caliper guide bolts and then remove the bolts themselves. Set them all aside nearby.
7. Remove the caliper, using a c-clamp to depress the piston. (Calipers in good condition shouldnt present any problems, but older ones may be difficult because the rotors are worn.) Push the piston back into the caliper when you are done.
8. Loosen the 16mm bolts while holding the caliper carrier to the steering knuckle, then remove the carrier from the knuckle. Clean the carrier with brake cleaner if it is dirty.
9. Using a dead-blow hammer, strike the rotor once at the 3 oclock position, once at the 9 oclock position, once at the 6 oclock position and once at the 12 oclock position, in that order. It should come loose and allow you to remove it. Dont use anything but a dead-blow hammer, or you may damage the rotor.
10. Use brake cleaner and a cleaning pad to get rid of the old anti-seize compound on the hub. Then apply new anti-seize to the hub. The coating should be very thin; make sure you get the threads of the bolt holes as well, as the face of the hub.
Putting the New Brakes On
11. Take the new rotor by the center (not the edges) and thread it onto the hub. You may wish to clean any preservative oils off the rotor and add some anti-seize before you do this, but it isnt necessary. Make sure its tight: the torque specs should be 12 ft*lbs.
12. Clean the carrier bracket in an appropriate wash basin, then spray it with brake cleaner and allow it to dry.
13. Reattach the caliper carrier bracket. The bolts need to be torqued to 81 ft*lbs.
14. Add a bit of grease to the lubrication points of the brake pads, and then insert them into the carrier. Its usually best to insert the outer pad first.
15. Reinstall the caliper. The retracted piston should allow it to fit into place without a problem.
16. Clean the caliper guide pins with brake cleaner and then reinsert them into their positions.
17. Reattach the guide bolt caps and the retaining clip.
18. Repeat the entire process with the other three wheels.
19. Place new brake fluid in the BMW and then lower the car off the jacks.

1. Park your BMW on a flat surface, such as in a garage, and set the parking brake. Unlatch the hood of your vehicle and raise it to access the engine. Locate the washer fluid reservoir and place the drain pan on the floor of the garage directly underneath the reservoir. Open the filler cap and reach down until you find the rubber hose connected at the bottom. Pull this hose off and allow it to drain into the pan on the floor.
2. Locate the power wire for the reservoir pump and unplug it from its connection. Use the sockets or wrenches to remove the mounting bolts on either side of the reservoir. Remove the fluid container from the engine and set it to the side with the mounting bolts.
3. Unlatch the wiring harness plug from the washer pump and free it from the firewall. Pay attention to the way the pump sets against the rubber grommet and how the fluid hose connects to the reservoir, as your new pump will come with a new rubber grommet and fluid hose. Mount the new pump in the same position until its up against the firewall; reattach the wiring harness.
4. Place the fluid reservoir back into its original place and connect the hose from the pump into the nipple on the bottom of the reservoir. Reconnect the wiring to the fluid transfer case and rethread the mounting bolts back into place. Tighten them with a wrench or the socket set. Fill the reservoir with fluid and close the hood of your vehicle. Start the engine and test the new pump until fluid comes out onto your windshield.

1. Open the glove box. Open the fuse box by turning the two white tabs on either side of it. Remove the #54 fuse, which controls the fuel pump. Remove the gas cap. Start the engine and let it run until it stalls from lack of fuel.
2. Raise the BMW with a floor jack. Lower it onto jack stands at all four corners. Remove the fuel filter protective panel, which is located under the car just to the front of the drivers seat. The panel is held on with four screws that are removed with a Phillips screwdriver.
3. Remove the metal clamp that holds the fuel filter in place using your hand. Loosen the six hose clamps that fasten the fuel lines to the fuel filter. Place a container under the filter to catch spilled fuel. Pull the hoses off of the filter. You may need to twist the hoses with pliers to get them off of the filter.
4. Drain the excess fuel from the filter into the container. Discard the filter. Install the new fuel filter in the same orientation as the old one. Slide the fuel lines onto the new filter. It is recommended to replace the BMW hose clamps with conventional hose clamps that can be tightened with a screwdriver, as the original clamps require a special tool to tighten easily. You can also use a pair of pliers to tighten the original hose clamps a little at a time.
5. Reinstall the clamp that holds the filter in place. Reinstall the oil filter protective panel. Lower the car back to the ground. Reinstall the #54 fuse. Put the fuel cap back on. Start the car and check for leaks.

1. Pop the hood on the car and make sure the engine is completely cool before you start. Even a slightly warm engine could result in serious burns. Disconnect the negative cable on the battery using a wrench to loosen the nut on the terminal. Place a drain pan under the radiator and drain the engine coolant by opening the valve on the bottom of the radiator with a wrench. Remove the engine undercover using a screwdriver.
2. Note the proper routing of the accessory drive belt and remove it by turning the idler pulley counter clockwise using a wrench. Remove the power steering pump using a wrench. Remove the secondary air pump and the bracket using a wrench to remove the bolts. Disconnect the radiator hoses using the screwdriver to loosen the hose clamps.
3. Unplug the wiring harness from the radiator fan. Place the wheel chocks behind the rear wheels of the Quattro. Lift the front end of the car using the automobile jack. Place a jack stand under the Audi near the jacking point and raise it to the frame. Remove the bolts from the mounting brackets using a wrench. Lower the radiator and fan together from the Audi.
4. Remove the fan unit from the old radiator and connect it to the new one. Install the radiator and fan unit together from the bottom of the car. Mount it in place by tightening the bracket bolts with a wrench. Remove the jack stand from under the Audi and lower the car to the ground. Plug the wiring harness into the fan unit.
5. Connect the radiator hoses and tighten the hose clamps with the screwdriver. Install the secondary air pump and brackets and secure it using a wrench. Install the power steering pump and tighten the mounting bolts with a wrench. Reinstall the accessory drive belt and tighten it by turning the idler pulley clockwise with the wrench.
6. Install the engine undercover using a screwdriver. Connect the negative battery cable and tighten the terminal nut with the wrench. Refill the radiator and reservoir with fresh engine coolant. Start the Audi and check the system thoroughly for leaking.

1. Park the Mercedes Benz CLK 320 in a safe work area.
2. Open the passengers side door and squat down beside the drivers 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 drivers seat.
3. Pull down the access panel and place it in the drivers 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 passengers 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.