Removal and installation of the steering knuckle Mercedes-Benz W203

REMOVAL

PROCEDURE

1. Loosen the wheel nuts, jack up the front of the car and place it on jack stands. 

2. Give wheel nuts and remove a decorative cap from a disk, remove a wheel. 

3. Tap out the hub nut washer with a drift, then reinstall the wheel without the cap and lower the vehicle to the ground.

4. Using a socket wrench with a long collar, loosen the hub nut.

5. Loosen the wheel nuts, jack up the front of the vehicle and place it on jack stands. Remove the wheel and give the hub nut. 

6. Release the flexible brake hose from the bracket on the steering knuckle assembly. Loosen the brake caliper and tie it with wire to the coil spring. Remove also an anchor bracket of a support and a brake disk ( the Brake system see the Head  ). 

7. Turn out two fixing screws and remove a brake disk from stubny assembly (  the Brake system see the Head ). 

8. Remove the ABS wheel sensor (see the Head  Brake system ). 

9. Disconnect the tie rod end from the steering knuckle (see Section  Removal and installation of tie rod ends ). 

10. Separate the lower suspension arm from the ball joint at the bottom of the steering knuckle (see Section Removal and installation of the front suspension lower control arm ). 

11. Separate the upper end of the fist from the ball joint of the upper suspension arm (see Section  Removal and installation of the upper control arm of the front suspension ).  

12. Gently pull the knuckle-hub assembly outward, removing it from the drive shaft trunnion. If necessary, tap on the end of the stud with a soft-faced hammer to release the CV joint from the hub. Tie up the driveshaft assembly with wire to prevent damage to the inner CV joint.

13. If there is a need to replace the wheel bearing, take the steering knuckle assembly to a car service workshop.

INSTALLATION

PROCEDURE

1. If the assembly was dismantled, install the hub on the steering knuckle (work must be done in a car service workshop). 

2. Lightly lubricate the splines of the driveshaft outer pin with special grease. Pass the trunnion through the hole in the hub, while filling the steering knuckle into its regular place. 

3. Connect the upper part of the fist to the ball joint of the upper suspension arm (see Section  Removal and installation of the upper control arm of the front suspension ). Tighten the ball stud nut to the required torque and secure it with a new cotter pin. 

4. Connect the ball joint at the bottom of the fist to the lower suspension arm (see Section  Removal and installation of the front suspension lower control arm ). Tighten the castle nut to the required torque and secure it with a new cotter pin (see Note in the previous paragraph). 

5. Replace the brake disc by firmly tightening the fixing screws. 

6. Establish an anchor bracket and a support, having tightened fixture of components with the demanded force ( the Brake system see the Head ). Attach the flexible brake hose to the support bracket on the steering knuckle assembly. Tighten the fixing bolts firmly. 

7. Screw the hub nut onto the drive shaft stub and tighten it firmly. 

8. Establish a wheel (if it is necessary - a cap of a disk), lower the car on the ground and tighten wheel nuts with the demanded effort (Specifications to the Head of Adjustment and routine maintenance see  ). 

9. Tighten the hub nut with the required force (see Specifications to the Head  Clutch and drive shafts ).

Source: http://automn.ru/mercedes-w203/mercedes-benz-4716-10.m_id-451.m_id2-454.html