41 14 021 Replacing Front Left Wheel Arch
Read contents of BODY, GENERAL and observe relevant procedures.
The reduced-weight aluminum front end structure (GRAV) is used on this vehicle.
Place vehicle on straightening bench.
Following new body parts are required:
- Wheel arch, front
Open rivet joints in areas (1) to (3).
As a rule, part of the punch rivet remains in the engine carrier in areas (2) and (3). Drill out remnants.
Open EMC WELD SEAM in area (1).
Installation:
Carry over hole pattern from engine carrier to new part in areas (1) to (3).
Use 4 rivets (size 13) in areas (1).
Use 6 rivets (size 13) in areas (2).
Use 8 rivets (size 15) in areas (3).
If the engine carrier is replaced at the same time as the wheel arch, rivets (size 13) must be used in areas (3).
Use 2 EMC SCREWS in areas (1).
Use 2 EMC SCREWS in areas (3).
If an engine carrier partial replacement has been carried out, 2 EMC SCREWS must also be used in areas (2).
Open rivet joints in areas (1) and (2).
As a rule, part of the punch rivet remains in the units compartment partition wall in areas (1) and (2). Drill out remnants.
Installation:
Carry over bores from units compartment partition wall to new part in area (2).
Use 3 rivets (size 13) in area (1).
Use 2 rivets (size 13) in area (2).
Open rivet joints in areas (1).
Installation:
Use 2 rivets (size 13) in areas (1).
Open weld joints in areas (1) and (2).
Open rivet joints in area (2).
Installation:
If necessary, replace brazed seams with MAG weld seams in area (1).
Use 2 rivets (size 13) in area (2).
Open weld joints in areas (1).
Open weld joints in area (1).
Mark severance cut according to measurement a and cut inside A-pillar.
Measurement a = 47 mm from center of bore.
Measurement a = 65 mm from center of bore.
Measurement b = 20 mm
Different riveting-down elements, depending on the equipment specification, must be mounted on the new component.
Preparation of new part:
Mark severance cut (1) according to vehicle. Cut outer metal sheet only.
Drill out metal sheet in areas (2).
Installation:
Adjust new part to fit with straightening attachment or universal mount.
Let parts overlap 10 mm at severance cut (1).
Weld new component from inside and outside over entire length (from outside if accessible).
Drill holes for RIVETS .
BOND new part.
RIVET new part.
Installation:
Seal new component in area (1) with sealing compound.
Installation:
There is no bore hole (1) for the support bearing centering pin in the new component!
Prior to installing spring strut, remove support bearing centering pin.