GLS Class (X166) Produced from 2016 to 2019

Ran out of fuel at little less than half a tank

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Old Jun 20, 2025 | 04:50 PM
  #26  
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2017 GLS 450,Bmw Z4 35i
Originally Posted by mikapen
Make sure your gas cap is venting properly. Easy fix if that's the case.
weird thing day before gas door would open itself telling me there is going to be a problem lol
i still have to press 3 times to close it

Last edited by serb; Jun 20, 2025 at 04:51 PM.
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Old Jun 20, 2025 | 04:51 PM
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2017 GLS 450,Bmw Z4 35i
Originally Posted by John CC
I thought you said it had a 3000 mile warranty. If they won't answer the phone have a lawyer contact them.
[Edit] Oh, I see that was a different purchase. Still, if you think they knew and they didn't disclose it, you could still have a lawyer call them.That always seems to get better results.


A simple connecting tube won't work once the level drops to the top of the saddle.
if i had money for a lawyer i would buy a brand new gls
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Old Jun 20, 2025 | 05:55 PM
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2017 GLS 450,Bmw Z4 35i
Ans somebody had to key it like the previous one,this car is a magnet for this


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Old Jan 20, 2026 | 07:42 PM
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8000 miles later i still refill at 50% and no problem but last few days i was getting short misfires at 70mph and no check engine codes,somebody said the actual problem might be high pressure fuel pump which is basically mechanical it runs of the camshaft,mpg is also pretty good 20-23,new hpfp is around 300$
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Old Jan 20, 2026 | 08:08 PM
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'17 GLS450, '14 GLK250, Grandpa's Roadster
Did you ever fix the transfer problem? Could be you tried to burn a little stale gas (or water) from the dead side of the tank.
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Old Jan 20, 2026 | 09:57 PM
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didnt have time and didnt give me any issues as long as i refueled at around 50-60% tank but now that i have this misfire i think something is on its way out whether its the hpfp or in tank pump,will need a deeper scan
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Old Feb 26, 2026 | 06:52 PM
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here is what i think happened,because the filter was never replaced the tube simply disconnected because it could not provide the pressure because of junk in the filter from all these years,got the new gasket,filter assembly and also got the bosch hpfp (p/n 0261520219) just in case,going to need to drop the exhaust and driveshaft to get to it,need a special wrench to open the tank





Last edited by serb; Feb 26, 2026 at 07:24 PM.
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