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Check Basic Position Of Camshafts - AR05.20-P-6010SVZ

Engine 279 in model 223 

Shown on the right cylinder head 

G16189692Courtesy of MERCEDES-BENZ USA
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
CAUTION Risk of injury  to skin and eyes due to handling of engine oil. Risk of poisoning  caused by swallowing engine oil Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.
AS18.00-Z-0001-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
REMOVING Remove     
1 Remove right cylinder head cover.   AR01.20-P-5012SVZ
2 Remove left cylinder head cover.   AR01.20-P-5013SVZ
INSPECT Check     
3 Position crankshaft at 30° after ignition TDC at cylinder 1. NOTES
Do not turn engine opposite to the direction of engine rotation.
The timing chain can skip otherwise and engine damage can occur.
IMPORTANT Turn engine at crankshaft in direction of engine rotation until mark 30° CKA at belt pulley (1) matches with mark at timing case cover (arrow).
SPECIAL TOOL Socket wrench bit
Fig 3
4 Check basic position of camshafts (3). IMPORTANT Basic position of camshafts (3) is only correct if SPECIAL TOOL holding device (6) can be installed free of tension at left cylinder head.
IMPORTANT Basic position of camshafts (3) is only correct if SPECIAL TOOL holding device (6) can be installed free of tension at right cylinder head.
SPECIAL TOOL Retaining device
Fig 2
    SPECIAL TOOL Retainer device
If basic position of camshafts (3) is incorrect:
↓
Set basic position of camshafts (3).
Fig 1
      AR05.20-P-6020SVZ 
INSTALLING Install     
5 Install left cylinder head cover.   AR01.20-P-5013SVZ
6 Install right cylinder head cover.   AR01.20-P-5012SVZ
Fig 1: Identifying Retainer Device (137 589 01 40 00)
G10108089Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Retaining Device (285 589 00 40 00)
G10108091Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Socket Wrench Bit (001 589 65 09 00)
G09981907Courtesy of MERCEDES-BENZ USA