Mercedes R 320 Workshop Manuals and Repair Manuals

To bleed the brakes on a Mercedes R 320, start by ensuring the master cylinder reservoir is filled with the recommended brake fluid. Begin at the brake caliper furthest from the master cylinder (usually the rear passenger side) and attach a clear plastic tube to the bleeder valve. Place the other end of the tube into a container partially filled with brake fluid. Have an assistant press the brake pedal slowly and hold it down. Open the bleeder valve to release the fluid and any air bubbles. Close the valve before releasing the brake pedal and repeat the process until all air is purged from the system.

To change the oil in a Mercedes R 320, start by locating the oil drain plug underneath the car and placing a drain pan underneath it. Remove the plug to drain out the old oil completely. Once drained, replace the drain plug and remove the oil filter. Install a new filter, then refill the engine with the recommended oil type and quantity.

To check the transmission fluid level in a Mercedes R 320, start the engine and let it reach normal operating temperature. Locate the transmission dipstick, which is usually marked with a yellow handle. Pull out the dipstick, wipe it clean, and reinsert it fully. Remove the dipstick again and check the fluid level against the markings on the dipstick. If the level is below the recommended range, add the appropriate transmission fluid until it reaches the correct level.

If suspecting a faulty fuel pump in a Mercedes R 320, start by checking the fuel pump relay and fuse to ensure they are in good condition. If they are fine, listen for the sound of the fuel pump running when the ignition is turned to the "on" position. If no sound is heard, it may indicate a faulty fuel pump. It is recommended to use a fuel pressure gauge to measure the fuel pressure at the fuel rail, as low pressure could be a sign of a failing pump. If unsure or unable to diagnose the issue, seek the assistance of a qualified technician.

To replace a cabin air filter in a Mercedes R 320, open the hood and locate the cabin air filter housing. Remove the clips or screws that secure the housing and carefully lift off the cover. Take out the old filter and clean any debris from the housing. Install a new cabin air filter, ensuring it is properly aligned, and then reattach the housing cover securely.

To replace a headlight bulb in a Mercedes R 320, open the hood and locate the back of the headlight assembly. Carefully disconnect the electrical connector and remove the retaining clip or screws that hold the bulb in place. Take out the old bulb and insert a new one, ensuring it is securely fitted. Reattach the retaining clip or screws, connect the electrical connector, and test the headlights to ensure proper functionality.

To replace a serpentine belt in a Mercedes R 320, locate the belt tensioner pulley and use a suitable tool to relieve tension on the belt. Slide the belt off the pulleys and carefully release the tensioner. Install the new belt by routing it over the pulleys according to the belt diagram, ensuring it is properly seated in each groove. Double-check the belt's alignment and tension, then start the engine and verify proper operation.

To replace a wheel bearing in a Mercedes R 320, start by safely lifting the vehicle and removing the wheel. Locate the wheel hub assembly and remove the brake caliper and rotor. Disconnect any ABS or wheel speed sensor wires if present. Remove the bolts securing the hub assembly to the suspension, then carefully separate the hub from the axle. Install the new wheel bearing by reversing the removal steps, ensuring all components are properly torqued and aligned.

To replace the air filter in a Mercedes R 320, open the hood and locate the air filter housing. Remove the clips or screws that hold the housing together and carefully lift off the cover. Take out the old air filter and clean any debris from the housing. Insert a new air filter, making sure it is properly seated, and then reattach the housing cover securely.

To replace the battery in a Mercedes R 320, start by turning off the engine and removing the key from the ignition. Locate the battery in the engine compartment and carefully disconnect the negative (-) terminal first, followed by the positive (+) terminal. Remove any brackets or fasteners holding the battery in place and lift it out of the compartment. Install the new battery, ensuring the terminals are connected correctly, and secure it with the brackets or fasteners. Finally, reconnect the positive (+) terminal followed by the negative (-) terminal.

To reset the service indicator on a Mercedes R 320, turn the ignition key to the "on" position without starting the engine. Press the "OK" button on the multifunction steering wheel to enter the main menu. Use the "+" or "-" buttons to navigate to the "Assyst Plus" option and press "OK" to confirm. Select "Service" and again press "OK" to confirm. Finally, select "Reset" and press "OK" to complete the reset process.

If experiencing an engine misfire in a Mercedes R 320, start by checking for any error codes stored in the vehicle's onboard diagnostic system using a compatible scanner. If codes are present, they can provide valuable information about the specific cylinder(s) affected and potential causes. Common causes of engine misfires include faulty ignition coils, spark plugs, fuel injectors, or air/fuel mixture issues. It is recommended to consult the repair manual or seek the assistance of a qualified technician for proper diagnosis and repair.

The frequency of brake pad replacement on a Mercedes R 320 depends on various factors such as driving style, road conditions, and mileage. As a general guideline, it is recommended to inspect the brake pads during regular maintenance intervals and replace them if they have less than 3mm of friction material remaining. However, it's important to refer to the specific recommendations outlined in the owner's manual or consult with a qualified technician for accurate advice.

The recommended tire pressures for a Mercedes R 320 can be found in the owner's manual or on a sticker located on the driver's side door jamb. The specific pressures may vary depending on factors such as load and driving conditions, so it's important to refer to the manual for accurate information. It is recommended to check the tire pressures regularly and adjust them as needed to ensure optimal performance and safety.

It is recommended to use a high-quality, ethylene glycol-based coolant that meets the specifications outlined in the owner's manual of the Mercedes R 320. This information can also be found on the coolant reservoir cap or in the engine compartment. Avoid using incompatible coolants or mixing different types, as it can lead to cooling system damage.