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E-Class (W211) 2003-2009

Fuel Filler Cap Polarity Change 1 & 2 Relays???

     
Old Feb 18, 2019 | 09:15 PM
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Fuel Filler Cap Polarity Change 1 & 2 Relays???
I have an 03 E500. Does anyone know what the 2 yellow relays (kG & kH) in the trunk on the driver side call Fuel Filler Cap Polarity Change 1 & 2 are for?
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Old Feb 19, 2019 | 11:17 AM
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G is energized to lock, H unlock fuel tank flap (fender door).
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Old Feb 19, 2019 | 12:25 PM
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Konigstiger- Thanks. Btw, do you know how the fuel pump operates? Having a start issue on my E500 (see my other post).
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Old Dec 19, 2021 | 04:50 PM
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i cannot seem to find anything but the relays on my WIS but i am probably not so facile with it.
does it mean that that lump encapsulated in grey soft foam at the back of my car (it's a wagon) is just a reservoir for a pneumatic lock on the fuel filler cap?
thanks!
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Old Dec 20, 2021 | 09:36 AM
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Post photo.
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Old Dec 20, 2021 | 10:29 AM
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Originally Posted by sciroccor
Does it mean that that lump encapsulated in grey soft foam at the back of my car (it's a wagon) is just a reservoir for a pneumatic lock on the fuel filler cap?
thanks!
That would be the dynamic seat pump, if we are talking about the one at left rearmost corner.
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Old Dec 20, 2021 | 10:58 AM
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Old Dec 20, 2021 | 11:05 AM
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2007 e63 estate, 1998 ITB golf, ITE scirocco (sold to a collector in Japan)
the wires (not ground or power) seem to go to the relays that are the fuel tank cap polarity. my fuel tank seems to open regardless of any circumstance. are there alternate relays for e63 w211 wagon?
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Old Dec 20, 2021 | 04:03 PM
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that seems to be the case!
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Old Dec 20, 2021 | 04:05 PM
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Originally Posted by Heguli
That would be the dynamic seat pump, if we are talking about the one at left rearmost corner.
that seems to be the case! thank you.
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Old Aug 20, 2024 | 12:14 AM
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Originally Posted by konigstiger
G is energized to lock, H unlock fuel tank flap (fender door).
MI Jack stand slammed into g and killed mi engine on tha highway lost fuel pressure instantly makes hella sense now🤞🏿🤞🏿🤞🏿 goat🤌🏿🤌🏿🤌🏿
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