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Discussion Starter · #1 · (Edited)
I have a 2017 GLA 45 and my buddy has a 2018 CLA 45. When I plug my Mercedes reader tool on his car I have the option to reset / view ethanol / Flex fuel content. I don't have that option on my 2017 GLA 45. When I was looking at parts online, I found out that there are 2 different variants of low pressure tank fuel pumps that MB offers for my GLA 45 but they are both not compatible with e85. Now when I switch the car to the 2018 CLA 45, there are a total of 3 pumps. 2 of them are the same exact model numbers as mine but a 3rd is with E85 compatibility. My question is can I install the E85 compatible pump on my 2017 GLA 45 and have everything work together? I want the pump to automatically adjust for ethanol content in my tank and push more power. Here are the part numbers:

246-470-16-94 (2017 GLA 45 & 2018 CLA 45 Compatible)
246-470-09-94-64 (2017 GLA 45 & 2018 CLA 45 Compatible)
246-470-11-94 (2018 CLA 45 Compatible) E85 Variant.
 

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FBO Stage 2 2016 GLA 250 4Matic.
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I have a 2017 GLA 45 and my buddy has a 2018 CLA 45. When I plug my Mercedes reader tool on his car I have the option to reset / view ethanol / Flex fuel content. I don't have that option on my 2017 GLA 45. When I was looking at parts online, I found out that there are 2 different variants of low pressure tank fuel pumps that MB offers for my GLA 45 but they are both not compatible with e85. Now when I switch the car to the 2018 CLA 45, there are a total of 3 pumps. 2 of them are the same exact model numbers as mine but a 3rd is with E85 compatibility. My question is can I install the E85 compatible pump on my 2017 GLA 45 and have everything work together? I want the pump to automatically adjust for ethanol content in my tank and push more power. Here are the part numbers: 246-470-16-94 (2017 GLA 45 & 2018 CLA 45 Compatible) 246-470-09-94-64 (2017 GLA 45 & 2018 CLA 45 Compatible) 246-470-11-94 (2018 CLA 45 Compatible) E85 Variant.
Considering that there aren't any other replies from anyone else that has taken modifying the GLA to your extent, I would show the part to an independent tuner and have them inquire about it. That would only be in terms of wether or wether not that specific part can indeed handle the task that you are setting up to it. They would also be able to let you know if you had to install a specific flex-fuel tune to run e85. The pump is only one part of it. As for compatibility, I took a look at the listing, MB has a section where it discusses the cross-compatibility. It does indeed look like it is good to go onto the 250, and 45 AMG. Best of luck.
 

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I for one not been replying because I don't have first-hand experience.

Folks on here have converted. The process seems to simply require the Alpha HPFP and a tune. Weistec will give you a tune.

I have heard of noone running in a flexfuel capacity. Only all-in, E85 or pump gas.

What are the long term consequences? No idea. Maybe your LPFP will rust out in a year :). Maybe you are GTG.
 

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Discussion Starter · #4 ·
If 2 parts are cross compatible, why cant the third one be as well? They list that fuel pump on the GLA 250 compatibility but not on the GLA 45? It doesn't make sense. I think it should work as a direct replacement. I want to give it a try but I need some advice from others to see if it is possible to just do a direct replacement.
 
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