Open liftgate using emergency unlocking feature - AR72.20-P-3515MCO

MODEL 451.4 

Fig 1: Checking Rear-End Door Opening Dimension

Courtesy of MERCEDES-BENZ USA

Dimensions: 

Fig 2: Unlocking Rear-End Door Using Screwdriver

Courtesy of MERCEDES-BENZ USA

1	Move left seat forward and fold backrest forward
2	Mark positions (arrows A) on left and right holes in rear-end door (1) according to dimensions (a, b)
3	Drill holes with a diameter of 5 mm in rear-end door (1).	Cordless drill/driver, cordless drill   Wet/dry vacuum cleaner	Figure
4	Guide screwdrivers (2) approx. 8.5 cm on left and right into holes.
5	Unlock rear-end door (1) by moving both screwdriver handles in direction of arrow.	Both locks must be unlocked simultaneously. Both screwdrivers (2) must press the relay lever (3) to the center of the vehicle.
6	Open rear-end door (1) at bottom.
7	Deburr holes and cover with suitable expansion clips (4).

Fig 3: Identifying Twist Drill Bit Set (450 589 01 70 00)

Courtesy of MERCEDES-BENZ USA