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Home >> BMW >> 2015 >> 640i 2D Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 97 (Functional Descriptions - 6-Series - Engine Performance Systems) >> Engine Performance - Functional Description >> Automatic engine start-stop function >> Brief component description >> Seat belt buckle switch

Seat belt buckle switch

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The automatic engine start-stop uses the seat belt buckle switch to identify whether the driver's 3-point automatic-reel belt is closed. If the driver's 3-point automatic-reel belt is not closed, the automatic engine start-stop reacts differently according to the driving condition:

Item Explanation
1 Seat belt buckle
2 Seat belt buckle switch