Quote:
Originally Posted by Diesel911
Valve Lock Nut 1539900251 (Mercedes Part Number minus the "A" at the Front of the Number that is normally not used).
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Lower Valve Adjustment Lock Nut
1539900251 (W0133-1643198, westpack number
)
Upper (Acorn/Cap Nut) Valve Adjustment Nut 615 053 00 72 (6150530072)