Weld In Inner Section Of End CROSSMEMBER - Ar64.20-S-1120-03E

Model 447.7 

with code UR1 (Seat rail system with quick-release attachment system) 

Model 447.7 

with code UR3 (Seat mount with quick fastener (2 passenger seat rows)) 

Model 447.7 

with code UR6 (Rear seats with quick-release locks (1st row)) 

Model 447.7 

with code ZU4 (Production Argentina) 

Model 447.8 

Model 448.7 

with code UR1 (Seat rail system with quick-release attachment system) 

Model 448.7 

with code UR3 (Seat mount with quick fastener (2 passenger seat rows)) 

Model 448.8 

Courtesy of MERCEDES-BENZ USA

1. Install crossmember inner section (1) and lower corner pillar reinforcement with locating tool, fit and fix in place.
2. 1. If the inner rear longitudinal member and rear longitudinal frame member were removed.

      Crossmember inner section (1) (areas AA and AB).

   2. If the inner rear longitudinal member and rear longitudinal frame member were not removed.

      Crossmember inner section (1) (areas A and B).

      Spot weld areas A and B only in accessible area.

3. Remove lower corner pillar reinforcement and locating tool.
4. Complete crossmember inner section (1) RP. * (areas A and B).

   Only if the inner rear longitudinal member and rear longitudinal frame member were not removed.

5. Crossmember inner section (1) (areas C to F).
6. Crossmember inner section (1) (areas G and H).

   Inert gas weld in intervals and allow to cool down in between.

   Reduces heat distortion.

7. Clean weld joints.
8. Remove shavings.

   Courtesy of MERCEDES-BENZ USA

9. Coat welding areas no longer accessible after installing bottom corner pillar reinforcement and end crossmember outer section, clean and coat with zinc dust paint.