Lift pump is shot, it has a leather seal, and it's leaking air in.
Replace with the new style "thumb" pump, it's internally sealed with o- rings and will not leak air.
The old one will leak air even if screwed down when the seal fails. Pretty sure it failed last time the filters were replaced, it's a common thing.
Won't start or run reliably until you replace and re-prime. Peter _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
