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Park pawl, function - GF27.10-P-5100-02N

Transmission 722.9 in model 171.4, 203, 209, 211, 215, 219, 220, 230, 463.303/340/341 

Fig 1: Park Pawl Function Chart
G07287835Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

In selector lever position "P" the cone (42) moves between the park detent (43) and pilot bushing (40). The parking lock pawl (43) is therefore pushed against the parking lock gear (4). If the tooth of the parking lock pawl (43) does not engage in a tooth space when the vehicle is stationary, but rather touches a tooth of the parking lock gear (4), the cone (42) is pre-tensioned by the spring (41) and positioned ready for operation. If the parking lock gear (4) continues to turn, the parking lock pawl (43) engages in the next tooth space.

To prevent damage due to misuse, the intervals between the tooth gaps are such that the park detent (43) can only engage when the vehicle is stationary or crawling at low speed. If the vehicle rolls faster, the shape of the teeth prevents the parking lock pawl (43) from engaging.