If any part of this system becomes blocked, you will be the first to know. The engine will stall and may blow out oil seals. I have seen a tech block one off with a major service by mistake.

I have not ever seen one clog on its own.

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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM