Check backrest frame structure - AR91.10-P-3336R

MODEL 230.4 except CODE (P99) "AMG Black Series" special model 

- with deployed emergency tensioning retractor unit 

MODEL 230.4 

- with CODE (P99) "AMG Black Series" special model 

- with code (494) USA version 

- with deployed emergency tensioning retractor unit 

Fig 1: Identifying Backrest Frame Structure Components

Courtesy of MERCEDES-BENZ USA

	Checking
1	Check seat frame of left or right front seat for deformation and crack formation	See:↓
		Check seat frame	AR91.10-P-3335R
2	Remove backrest padding		AR91.10-P-1090R
3	Check structure of backrest frame (3) and cross struts (2) for deformation and crack formation	If crack formation is discovered in the vicinity of the weld seams (arrow), or the backrest frame (3) or the cross struts (2) are deformed, a new backrest frame (3) must be installed. Refer to: ↓ Remove/install front seat backrest frame
		Front seat with code (404) Left multi-contour seat or code (405) Right multi-contour seat	AR91.10-P-3331R
4	Install backrest padding		AR91.10-P-1090R
5	Install seat cushion	Model 230.4 without code (494) USA version and without code (P99) "AMG Black Series" special model ; Model 230.4 with code (494) USA version driver seat ; Model 230.4 up to 28.2.06 with code (494) USA version front passenger seat	AR91.10-P-3310R
		Model 230.4 as of 1.3.06 with code (494) USA version front passenger seat	AR91.10-P-3310RA
6	Install front seat		AR91.10-P-1000R
7	Read fault memory, erase if necessary
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS system	*WH58.30-Z-1048-13A