Replacement: coil springs – Mercedes Vito W639. Tip from AUTODOC experts:
Both coil springs of the front suspension should be replaced simultaneously.
The replacement procedure is identical for the left and right coil springs of the front suspension.
All work should be done with the engine stopped.
Replacement: coil springs – Mercedes Vito W639. Take the following steps:
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:
Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. Mercedes Vito W639
Step 5
Remove the wheel.
Step 6
Clean the stabiliser link fasteners. Use a wire brush. Use WD-40 spray.
Step 7
Unscrew the fastener connecting the stabilizer link to the shock strut. Use a drive socket #18. Use a ratchet wrench.
Step 8
Remove the stabilizer rod.
Step 9
Detach the brake hose from the shock strut. Use a flat screwdriver.
Step 10
Release the ABS sensor wiring harness from the holder on the shock absorber. Disconnect the fastener of the brake pad wear sensor wire from the suspension strut.
Step 11
Disconnect the ABS sensor wiring.
Step 12
Clean the fasteners connecting the shock strut to the steering knuckle. Use a wire brush. Use WD-40 spray.
Step 13
Unscrew the fasteners connecting the suspension strut to the steering knuckle. Use a combination spanner #21. Use a drive socket #21. Use a ratchet wrench.
Step 14
Remove the fastening bolts.
Step 15
Disconnect the steering knuckle from the shock absorber strut.
Step 16
Lower the car.
Step 17
Open the bonnet.
Step 18
Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
Step 19
Unscrew the fasteners of the cowl grille. Use Torx T25. Use a ratchet wrench.
Step 20
Remove the clips of the plastic cowl grille. Use a flat screwdriver. Use ear clamp pliers.
Step 21
Unscrew the fasteners of the windscreen wiper arms. Use a drive socket #13. Use a ratchet wrench.
Step 22
Remove the wiper arms.
Step 23
Detach the windscreen washer nozzle hose.
Step 24
Raise up and remove the cowl grille. Use a flat screwdriver.
Step 25
Take out the cabin filter bracket. Use Torx T25. Use a ratchet wrench.
Step 26
Remove the lower wiper plastic cowl grille.
Step 27
Detach the windscreen washer nozzle hose.
Step 28
Unscrew the fasteners of the windscreen wiper linkage panel. Use a drive socket #13. Use a ratchet wrench.
Step 29
Remove the panel assembled with the windscreen wiper linkage.
Step 30
Unplug the wiper motor connector. Use a flat screwdriver.
Step 31
Remove the suspension strut mount cap. Use a flat screwdriver.
Step 32
Clean the upper fastener of the suspension strut mount. Use a wire brush. Use WD-40 spray.
Step 33
Unscrew the top fastening of the shock strut mount. Use a drive socket #21. Use a ratchet wrench.
Note that when using a spring compressor, spring coils need to be securely gripped, compressing the spring on the opposite sides.Ensure the correct position of the spring in the retainer.Make sure that the spring coils tightly entered the lock handles.
Step 36
Compress the spring.
Step 37
Treat the shock strut rod. Use WD-40 spray.
Step 38
Remove the strut piston rod nut. Use a drive socket #20. Use a ratchet wrench.
Step 39
Remove the shock absorber mount, dust boot, and bump stop. Use a flat screwdriver.
AUTODOC recommends:
Replacement: coil springs – Mercedes Vito W639. Carefully inspect the mount, the boot, and the bump stop of the shock absorber. Replace if necessary.
Step 40
Release the coil spring.
Step 41
Remove the spring.
Step 42
Install the spring on the shock absorber.
Step 43
Compress the spring.
Step 44
Install the mount, the boot and the bump stop on the shock absorber.
Step 45
Tighten the shock strut piston rod nut. Use a drive socket #20. Use a torque wrench. Tighten it to 56 Nm torque.
Make sure not to mix up the wiper arms on the driver's and passenger's sides.
Step 63
Attach the windscreen washer nozzle hose.
Step 64
Remove the fender protection cover.
Step 65
Close the hood.
Step 66
Raise the front of the car and secure on supports.
Step 67
Treat the shock strut mounting seat on the steering knuckle. Use a wire brush. Use WD-40 spray.
Step 68
Fix the shock absorber strut on the steering knuckle.
Step 69
Install the fastening bolts.
Step 70
Tighten the lower fasteners connecting the shock strut to the steering knuckle. Use a combination spanner #21. Use a drive socket #21. Use a torque wrench. Tighten it to 120 Nm torque.+75°
AUTODOC recommends:
Important! Be sure to use new fasteners.
Step 71
Fasten the brake hose on the strut. Use a flat screwdriver.
Step 72
Secure the stabilizer link on the suspension strut. Use a crowbar.
Step 73
Tighten the fastener connecting the stabilizer link to the shock strut. Use a drive socket #18. Use a torque wrench. Tighten it to 85 Nm torque.
Step 74
Connect the fastener of the ABS sensor cable to the shock absorber strut. Connect the fastener of the brake pad wear sensor wire to the suspension strut.
Step 75
Connect the ABS sensor wiring.
Step 76
Treat the shock strut fasteners. Treat all joints of the stabiliser link. Use copper grease.
Step 77
Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 78
Clean the brake disk surface. Use a brake cleaner.
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