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Old 09-08-2018, 09:12 PM
97 SL320 97 SL320 is offline
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Join Date: Jan 2012
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A very common size is 8mm / 5/16"

I don't know this car specifically, but on a EFI car, MB generally uses a 5/8" ish hose from the tank to electric fuel pump then smaller line from there. Pinching off the 5/8" line should work.

You are still going to get some fuel leakage when the hose is removed.
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