Important!

This replacement procedure can be used for:
MERCEDES-BENZ VITO Bus (638) 108 D 2.3 (638.164), MERCEDES-BENZ VITO Bus (638) 110 TD 2.3 (638.174), MERCEDES-BENZ VITO Bus (638) 113 2.0 (638.114, 638.194), MERCEDES-BENZ VITO Bus (638) 114 2.3 (638.134, 638.194), MERCEDES-BENZ VITO Bus (638) 108 CDI 2.2 (638.194), MERCEDES-BENZ VITO Bus (638) 110 CDI 2.2 (638.194) … View more

The steps may slightly vary depending on the car design.

How to change front suspension arm on MERCEDES-BENZ VITO 1 (W638) [TUTORIAL AUTODOC]

Alternative products

Suspension arm

Replacement: front lower arm – Mercedes Vito W638. List of the tools you'll need:

                      Wire brush
                    
                      WD-40 spray
                    
                      Copper grease 
                    
                      Drive socket # 8 
                    
                      Drive socket # 19 
                    
                      Combination spanner #18
                    
                      Combination spanner #21
                    
                      Wheel impact socket #17
                    
                      Ratchet wrench
                    
                      Torque wrench
                    
                      Flat chisel
                    
                      Hammer
                    
                      Crow bar
                    
                      Hydraulic transmission jack
                    
                      Wheel chock

Buy tools

Replacement: front lower arm – Mercedes Vito W638. AUTODOC recommends:

The replacement procedure is identical for the left and right lower control arms.
All work should be done with the engine stopped.

Replacement: front lower arm – Mercedes Vito W638. Use the following procedure:

Step 1

Secure the wheels with chocks.
Step 2

Loosen the wheel mounting bolts. Use wheel impact socket #17.
Step 3

Raise the front of the car and secure on supports.
Step 4

Unscrew the wheel bolts.

AUTODOC recommends:
Important! Hold the wheel while unscrewing the fastening bolts. Mercedes Vito W638
Step 5

Remove the wheel.
Step 6

Clean all joints of the arm. Use a wire brush. Treat all joints of the arm. Use WD-40 spray.

AUTODOC recommends:
Replacement: front lower arm – Mercedes Vito W638. After applying the spray, wait a few minutes.Wear protective goggles.
Step 7

Unscrew the ball joint fastening to the steering knuckle. Use a combination spanner #21 (2 pieces).
Step 8

Unscrew and remove the wheel arch cover fasteners. Use a drive socket #8. Use a ratchet wrench.
Step 9

Remove the wheel arch cover.
Step 10

Unscrew the front arm fastener. Use a combination spanner #18. Use a drive socket #19. Use a ratchet wrench.
Step 11

Remove the fastening bolt. Use a crowbar.
Step 12

Unscrew the rear arm fastener. Use a combination spanner #21. Use a drive socket #19. Use a ratchet wrench.
Step 13

Clean the fastener connecting the ball joint to the steering knuckle. Use WD-40 spray.
Step 14

Release the fastener connecting the ball joint to the steering knuckle. Use a flat metal-working chisel. Use a hammer.
Step 15

Disconnect the spherical joint from the arm. Use a crowbar.
Step 16

Remove the arm. Use a crowbar.
Step 17

Clean the mounting seats and the thread of the suspension arm. Use a wire brush. Use WD-40 spray.
Step 18

Install a new arm.

Replacement: front lower arm – Mercedes Vito W638. AUTODOC experts recommend:
During the installation process, use only new bolts and nuts.Do not damage the ball joint cover.
Step 19

Connect the ball joint to the steering knuckle.
Step 20

Support the arm. Use a hydraulic transmission jack.
Step 21

Take the flat chisel out of the steering knuckle.
Step 22

Install the fastening bolt. Do not tighten it.
Step 23

Screw the rear arm fastener. Use a drive socket #19. Use a combination spanner #21. Use a ratchet wrench.
Step 24

Raise the hydraulic transmission jack by 10-15 cm.
Step 25

Tighten the front fastener connecting the control arm to the subframe. Use a drive socket #19. Use a torque wrench. Tighten it to 155 nm torque.
Step 26

Tighten the rear fastener of the control arm. Use a drive socket #19. Use a combination spanner #21. Use a torque wrench. Tighten it to 90 nm torque.
Step 27

Tighten the ball joint fastener. Use a combination spanner #21. Use a torque wrench. Tighten it to 162 nm torque.
Step 28

Remove the support from under the arm.

AUTODOC recommends:
Replacement: front lower arm – Mercedes Vito W638. Lower the transmission jack smoothly, without jerks, to avoid damaging components and mechanisms.
Step 29

Treat all joints of the arm. Use copper grease.
Step 30

Install the wheel arch cover to its mounting seat.
Step 31

Install and tighten the wheel arch cover fasteners. Use a drive socket #8. Use a ratchet wrench.
Step 32

Clean the wheel rim mounting seat. Use a wire brush. Treat the contacting surface. Use copper grease.
Step 33

Install the wheel.

Replacement: front lower arm – Mercedes Vito W638. Tip from AUTODOC:
To avoid injury, hold up the wheel when screwing in the fastening bolts.
Step 34

Screw in the wheel bolts. Use wheel impact socket #17.
Step 35

Lower the car and working in a cross order, tighten the wheel bolts. Use a torque wrench. Tighten it to 175 nm torque.
Step 36

Remove the jacks and chocks.

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