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Contact your local Mercedes-Benz dealership. Your 1995 E320 comes with a keyless entry system that requires a special key manufactured by Mercedes-Benz USA to operate the vehicle.

Provide Mercedes-Benz with the vehicle identification number, or VIN, and the year of your Mercedes E320. The VIN is located on all of your purchase paperwork, insurance cards and on the door panel of the drivers door. MB needs your VIN because it contains the key code for your specific vehicle, which lets them know exactly how to cut your new key to make it work with your MB.

Pick up your new key from Mercedes. Before you pay for and leave with your key you must be able to prove you own the vehicle by providing proof of ownership. Photo identification along with your purchase paperwork, title, registration and/or insurance card are all acceptable.

Locate the Diagnostic Link Connector (DLC) port on the drivers side dashboard under the steering column.

Plug the OBD I scanner into the DLC port.

Put the key into the ignition and turn it to the "On" position. This will power on the scanner.

Select the "Clear Codes" or similar option. Wait for the scanner to return to the main menu. This will indicate that the task has been completed.

Unplug the scanner and start the engine. Verify that the Check Engine light has shut off.

Park the vehicle and turn off the ignition. Find the open OBD port under the steering column. Plug the OBD I scan tool into the open port.

Put the key into the ignition and turn it to the "ACC" position and do not start the engine.

Turn on the OBD I scan tool and wait for it to read the codes.

Wait for the display on the OBD I scan tool to read "OK," then turn off the ignition and the scan tool.

Select the "Menu" command and scroll through it until you see "Stored Codes." Select this option and write down the alphanumeric codes on a piece of paper.

Look up the codes in the scan tools manual. Unplug the scan tool and have your Chevy serviced or repaired according to the diagnostic codes.

Raise the front of your truck off the ground with a jack and support it by placing a set of jack stands under the frame rails. Lower the jack, setting the truck securely on the stands then remove the jack from under the truck.

Slide under the truck and locate the catalytic converter in the exhaust system just down from the engine. One sits in each pipe, so you will need to complete the process twice if you are removing both converters.

Remove the retaining bolts from the rear-mounting flange where the converter and exhaust pipe meet with a wrench. Lower the exhaust pipe away from the rear of the converter and lay it off to one side.

Move to the front of the converter and remove the bolts from the front mounting flange with a wrench. Separate the converter from the front pipe and lower it out from under the truck.

Pop the hood to your Dodge Avenger and look over the battery.

Use a socket wrench to tighten the connections from the battery terminals and the connector cables going to your engine.

Loosen the connections and then use soda and a wire brush to clean any corrosion off of the connector cables.

Jump start the car and leave it running for five minutes. Turn the car off and then try to restart it. If the car does not restart, you will need to replace the battery.

Check the fuel levels on the Avenger. Fill the car up with one gallon of gas and then try to restart the car. If the car restarts, have a mechanic repair your gas gauge.

Disconnect the negative terminal on the battery with a socket wrench to avoid starting the engine accidentally. Open the fuel filler cap to relieve the vapor pressure in the fuel tank. Remove the cap for the fuel pressure fitting on the fuel rail, and wrap a shop towel around the fuel pressure fitting. Attach fuel pressure valve J 34730-1A to the fuel pressure fitting, and place the bleed hose into container approved for gasoline. Open the valve to release the pressure in the fuel system, and fasten the fuel filler cap.

Raise the vehicle with a jack and support it on jack stands. Disconnect the filler vent hose from the fuel tank and connect the open end of the hose to a hand-operated pump. Drain as much fuel from the fuel tank is possible into a gasoline container.

Detach the electrical connector for the fuel sender and remove the fuel lines from the fuel sender. Disconnect the quick connectors for the fuel pipe and support the fuel tank with jack stands. Remove the bolts for the fuel tank retaining straps with a socket wrench and disconnect the rear hangar of the exhaust system. Disconnect the fuel tank and remove it from the vehicle.

Turn the locking ring for the fuel sender assembly counterclockwise with tool J-24187. Lift the fuel sender assembly carefully from the fuel tank, detach the fuel pump from the fuel gauge sender unit. Discard the O-ring on top of the fuel sender. Disconnect the electrical connector for the fuel comp, and release the clamps around the fuel pump. Pull the fuel from its rubber connectors.

Install the new fuel pump by performing Steps 2 through 4 in reverse, ensuring that you also install a new O-ring. Fill the fuel tank, and connect the negative terminal on the battery with a socket wrench. Turn the ignition on to pressurize the fuel system, and check for fuel leaks.

Remove the cover off the diagnostic port of the Ford, located under the dashboard on the left-hand side.

Plug in the OBD scanner into the link of the diagnostic port. Code scanners can be found at your local auto-parts store. You can also ask a local auto-parts store if they can plug in a store-owned scanner for you to check the codes.

Run the self-test with the code scanner. Read the manufacturers instructions to find out how your particular scanner runs the self-test.

Write down the codes as the scanner reports them. There may be several codes--allow the scanner to run through the entire test.

Move through the codes as they appear, but do not delete them.

Remove the data cable and replace the cover over the port when complete.

Disconnect the negative terminal of the Sables battery with a socket wrench. Relieve the pressure in the fuel system. Pump the fuel out of the fuel tank through the filler neck with adapter hose 034-00011 and rotunda fuel storage tanker 034-00002.

Raise the vehicle on jack stands and remove the filler tube for the fuel tank. Support the fuel tank, and disconnect the support straps for the fuel tank. Disconnect the fuel lines, vent lines and electrical connectors from the fuel tank. Disconnect the fuel tank.

Clean the area around the attaching fuel pumps attaching flange on the fuel tank with a shop rag. Turn the lock ring for the fuel pump counter-clockwise with fuel tank sender wrench D84P-9275-A, and remove the lock ring. Disconnect the fuel pump assembly from the fuel tank, and remove the gasket from the attaching flange on the fuel tank.

Clean the mounting surfaces on the fuel tank. Apply a thin layer of grease to the new gasket, and place it into the fuel ring groove of the fuel tank. Place the fuel pump assembly into position without damaging the fuel filter. Replace the lock ring so that the locking tabs on the lock ring are under the tabs on the fuel tank. Turn the lock ring clockwise with fuel tank sender wrench D84P-9275-A until the lock ring reaches the limit of its travel.

Install the fuel tank and connect the fuel lines, vent lines and electrical connection for the fuel tank. Lower the vehicle and install the filler tube. Add 10 gallons of fuel to the fuel tank, and check the fuel system for leaks. Connect the cable to the negative terminal of the battery.

Attach a fuel pressure gauge. Turn the ignition on for three seconds, and repeat this procedure at least five times to pressurize the fuel system to at least 30 pounds per square inch. Check the fuel system for leaks and disconnect the pressure gauge. Start the vehicle and check for leaks once again.

Remove your right and left saddlebags. If you have throw-over saddlebags, remove the seat by unscrewing the Allen bolt that secures your seat to the rear fender. You will probably not have to remove your saddlebag supports. If you have bolt-on saddlebags, immobilize the nut inside your fender with a box wrench, then loosen the nut on the outside of the fender with a socket wrench.

Raise the bike on a motorcycle jack until the rear wheel is completely off the ground. Make sure your motorcycle is stable.

Remove the lower shock mounting bolt and the washer nut on one side of your Sportster. Set them aside for reuse. Remove the upper bolt, washer and cover and set aside for reuse. Remove the shock absorber. Repeat on the other side.

Install the new shorter shocks, one side at a time. Put thread locker on the lower shock mounting bolt and reinstall. Reinstall the upper shock mounting bolt, using thread locker. Repeat for the opposite side.

Lower the bike carefully and support on the jiffy stand. Reinstall the saddlebags and the seat.

Detach the cable from the batterys negative terminal. Open the filler cap for the fuel tank, and disconnect the air cleaner. Connect a fuel pressure gauge to the pressure relief valve on the fuel rail, and place the end of the drain tube into a container. Open the fuel pressure gauge, and allow the fuel to drain into the container. Remove the fuel pressure gauge, and close the filler cap to the fuel tank. Connect the air cleaner assembly.

Remove the cushion from the rear seat, and disconnect the grommet on the floor pan. Detach the electrical harness from the fuel pump. Press the tabs on both sides of the quick-connect fittings for the fuel lines of the fuel pump, and gently disconnect the fuel lines.

Turn the locking ring for the fuel pump counterclockwise with Fuel Tank Sender Wrench D84P-9275-A. Detach the locking ring from the fuel pump, and remove the fuel pump without damaging the fuel gauge sender or fuel filter.

Discard the O-ring on the fuel tank, and clean the groove on the fuel tank with a shop rag. Apply a thin layer of grease to the new O-ring seal, and place it onto the groove of the fuel tank. Carefully install the fuel pump into the tank to prevent damage to the fuel gauge sender or the fuel pick-up filter.

Place the locking ring for the fuel pump so that the locking tabs of the locking ring are under the locking ring tabs of the fuel tank. Turn the locking ring clockwise with the fuel tank sender wrench until the retainer ring is against its stops. Connect the fuel lines and electrical connector for the fuel pump. Connect the grommet on the floor pan, and replace the rear seat cushion. Connect the cable for the negative battery terminal. Start the engine, and check for fuel leaks.