Siphon won't "come back". When is the last time you drove lower than 1/4 tank?

Use the OBC hidden menu 6 to watch your tank levels. When the left has about 27L the right should have about 1.4L (level ground steady speed).

When the siphon fails the right will drop to zero as the left will maybe have 20L or so. The right should never drop below 1.4 (each car is different yours might be 1.6 but learn the value).

You can use test six as a fuel gauge until you get it fixed.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)