Mercedes-Benz GLA Forum banner
1 - 9 of 9 Posts

·
Retired Moderator
Joined
·
378 Posts
Discussion Starter · #1 ·
Last week while driving on freeway gas gauge suddenly dropped to 0. Minutes before it had been near 1/2. I stopped at next gas station did several key switches and it stayed at 0. Decided to fill up and go by trip odometer until I could get into dealership. It only took 8 gallons to fill. About 2 hours later stopped for lunch. On restart gauge function returned to normal. It's been OK now for a week. No point in taking to dealer if it's working. Any ideas on what hsppened?
 

·
Registered
Joined
·
184 Posts
Last week while driving on freeway gas gauge suddenly dropped to 0. Minutes before it had been near 1/2. I stopped at next gas station did several key switches and it stayed at 0. Decided to fill up and go by trip odometer until I could get into dealership. It only took 8 gallons to fill. About 2 hours later stopped for lunch. On restart gauge function returned to normal. It's been OK now for a week. No point in taking to dealer if it's working. Any ideas on what hsppened?
The sensor is entitled to a lunch break as well. IT should be in your owners manual ;)

AH, no, in all seriousness perhaps there is some kind of loose connection, although that probably wouldn't explain it coming back online... perhaps a simple software malfunction.... Can you tell I'm reaching ;):D
 

·
Retired Moderator
Joined
·
378 Posts
Discussion Starter · #3 ·
Dealer can't diagnose fuel gauge problem

Took my GLA into dealer last week. They found two fault codes stored for my fuel gauge. Problem is that MB has not provided dealers with either diagnostics or repair for those fault codes. Best the dealer could do was clear the codes and tell me to come back if the problem happens again. Hopefully MB will have provided diagnostic and repair procedures by then.
 

·
Registered
Joined
·
694 Posts
Not sure about the temperatures but even if it was because of that it seems like something that shouldn't be happening in a brand new vehicle.
when it gets cold, sometimes cars act weird, reason why car makers do extreme weather testing, all part of their quality control. plus consider the time of year we're in right noow
 

·
Retired Moderator
Joined
·
378 Posts
Discussion Starter · #7 ·
Don't think problem caused by cold temperatures

When the gauge stopped working I was on vacation in south Florida, low 80s outside with A/C on. My first thought was that maybe the cold air ducted behind dash caused a bad solder joint to shrink and lose connection. Since then it has been to -10F here in Indiana with no further problems, so I discount the cold as the cause.
 

·
Registered
Joined
·
3 Posts
Don't think problem caused by cold temperatures

When the gauge stopped working I was on vacation in south Florida, low 80s outside with A/C on. My first thought was that maybe the cold air ducted behind dash caused a bad solder joint to shrink and lose connection. Since then it has been to -10F here in Indiana with no further problems, so I discount the cold as the cause.
Did this problem ever come back for you?

I just recently had this happen on a road trip for me. I drove from Minneapolis to Denver, about halfway the gauge went out when the gas was at half of a tank. I pulled off the highway, turned the car off and on a few times and nothing. Then a check engine light. Started driving again and in about 10 mins the gauge came back. Stopped in Denver at an AutoZone to get the code read which was just a "error reading gas gauge". After filling up with gas, the error code went away.
 

·
Super Moderator
Joined
·
922 Posts
As my co-mod Wayne likes to remind there are no perfect electrical connections, just some better than others.

The gas tank float sensor or the gas gauge or the wiring harness/loom itself could have intermittent electrical issues, which are always the hardest to diagnose. Or it could just be a computer glitch since most everything these days interfaces with same.

As the prior thread response is now 7 years old unlikely to get feedback. So I'll reiterate that it's true that most dealership service departments will reset the alert and have you await a more continuous fault. The ol' days of simply replacing the tank sensor (most often the issue as continually immersed) or the gauge were easier.
Did this problem ever come back for you?

I just recently had this happen on a road trip for me. I drove from Minneapolis to Denver, about halfway the gauge went out when the gas was at half of a tank. I pulled off the highway, turned the car off and on a few times and nothing. Then a check engine light. Started driving again and in about 10 mins the gauge came back. Stopped in Denver at an AutoZone to get the code read which was just a "error reading gas gauge". After filling up with gas, the error code went away.
 
1 - 9 of 9 Posts
Top