Mercedes Benz Air Fitting Seal Ring: Inner Seal Ring for big 17mm Hex Fitting, W112/W109/W100, Mercedes Benz 112-997-05-40

This inner Seal Ring is for all Mercedes Benz air suspension cars.  Located in a groove at the bottom of the M14 x1 female/ inner thread.  M14 (17mm hex)  Fittings are used for rear air spring connecting pipe (all cars) and M100 pressure regulator brake port and fitting at W100 brake booster.

Fits

W100/ 600 Grosser Mercedes, 

W109.015, W109.016, W109.018, W109.056,
W109.057

W112

Mercedes Benz  part number

A1129970540,  A112 997 05 40,  A112 997 0540,  A112-997-05-40, 

A112-997-0540,

1129970540, 112 997 05 40, 112 997 05 40, 112-997-0540, 112-997-05-40.