This is a genuine Mercedes used part. These are much stronger than the aftermarket ones available. Genuine are no longer made. No damage to the slot or the threads. Only for models listed. Does not work on later aluminum diesel engines. Collar nut holds pre-chamber in cylinder head. These loosen over time and can cause fuel and air bubble leaks around the collar nut. See our special tools for tightening and removing. Type pre-chamber in the search box.....
Product Details
Collar nut location on 615 616 and 617 diesel engines:
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