Help with fuel sender unit!
Thread Starter
Newbie
Joined: Sep 2017
Posts: 5
Likes: 0
From: London, UK
Mercedes E55 AMG
Help with fuel sender unit!
Hi there,
i am going to be replacing my fuel sender unit on my 2003 e55 amg however, i have seen all new units have a fuel tank pressure sensor but the one I have on it now has not got one, will I need to add wiring? Or can I just change it over without having to connect the sensor?
Thank you
i am going to be replacing my fuel sender unit on my 2003 e55 amg however, i have seen all new units have a fuel tank pressure sensor but the one I have on it now has not got one, will I need to add wiring? Or can I just change it over without having to connect the sensor?
Thank you
Senior Member
Joined: May 2007
Posts: 276
Likes: 30
From: United Kingdom
CLK56TT (WIP), S65, RR 5.0 S/C
It’s not a sensor but a fuel pressure regulator. It’s there as it prevents the overpressurising. It doesn’t use or need any wiring. You’re probably confusing it with something else. Take a picture of what you’ve got and post it up here.
Banned
Joined: Mar 2013
Posts: 127
Likes: 14
Hi there,
i am going to be replacing my fuel sender unit on my 2003 e55 amg however, i have seen all new units have a fuel tank pressure sensor but the one I have on it now has not got one, will I need to add wiring? Or can I just change it over without having to connect the sensor?
Thank you
i am going to be replacing my fuel sender unit on my 2003 e55 amg however, i have seen all new units have a fuel tank pressure sensor but the one I have on it now has not got one, will I need to add wiring? Or can I just change it over without having to connect the sensor?
Thank you
Thread Starter
Newbie
Joined: Sep 2017
Posts: 5
Likes: 0
From: London, UK
Mercedes E55 AMG
You are right,its a tank pressure sensor and it doesent need to be connected if your car dont have that wiring,however there are two different types of fuelcouplings on the sender units,male or female,be sure that its fit your pumpunit(check VIN) this have been discussed on the forum before.
Thank you so much for your help guys!
MBWorld Fanatic!
Joined: Aug 2011
Posts: 3,428
Likes: 288
From: New Zealand
There are two different versions of the sender and pump assemblies. Get the correct one for your car. PZEV and non-PZEV (partial zero emissions vehicle). Both sides must match or your pumps won't be able to have the sender hoses attached. You have the non-PZEV version. Search some of the threads I have posted in regarding fuel components for more information.
Thread Starter
Newbie
Joined: Sep 2017
Posts: 5
Likes: 0
From: London, UK
Mercedes E55 AMG
There are two different versions of the sender and pump assemblies. Get the correct one for your car. PZEV and non-PZEV (partial zero emissions vehicle). Both sides must match or your pumps won't be able to have the sender hoses attached. You have the non-PZEV version. Search some of the threads I have posted in regarding fuel components for more information.
thanks again for your help
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MBWorld Fanatic!
Joined: Aug 2012
Posts: 1,790
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From: DownEast Maine
CLS 55 AMG E500 ML320
how about if I change the tops? The fuel was leaking from the plastic piece that goes into the hose as it broke, I'll get the febi filter and mod the hole to have it fit I read a thread on it so there's a new filter, i see a used one from Germany for sale I think the hoses will fit the couplers look the same, it's just annoying having to pay nearly 400 quid for a small plastic piece! Lol! Good old mercedes 😂😂
thanks again for your help
thanks again for your help
MBWorld Fanatic!
Joined: Aug 2011
Posts: 3,428
Likes: 288
From: New Zealand
You can't just change the top. They only sell it as a whole assembly. I am in the exact same situation. Unless you have updated it recently you will need to change both sides at the same time as they updated them together. As pointed out it is regarded as a regular maintenance item... good times.
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Joined: Apr 2016
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2005 C55 AMG (sold), 2005 E55 AMG
