For Filler Cap Lock Pin: Use: (Qty.) (1) 140-991-00-55.(Tool). This Tool may be longer than the Dipstick Tube, if so, insert it until it bottoms out, and check the fluid level.Use and remove, do not leave in the vehicle.
Part#: 140-589-15-21-00-MBZ
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Mercedes-Benz Transmission Dipstick - 140589152100 - Genuine Mercedes.