Fuel Gauge Not Working - Mercedes Benz SLK Forum

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#1 Old 01-25-2017
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Fuel Gauge Not Working

Hello a few years ago I tried to jumpstart my friends car and after that I noticed my fuel gauge stopped working. It usually goes past full and turns until it is touching the other gauge. Some other times it will just randomly move around I just use the odometer to keep track now but I really want to fix it. Any ideas?
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#2 Old 01-25-2017
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start here - Techron cleans fuel gauges and components

https://www.slkworld.com/general-disc...-tier-gas.html

also check the fuse for it


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#3 Old 01-26-2017
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Quote:
Originally Posted by jbanks15 View Post
start here - Techron cleans fuel gauges and components

https://www.slkworld.com/general-disc...-tier-gas.html

also check the fuse for it
Could I just use sea foam I have been told to use that before to clean up the engine.
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#4 Old 01-26-2017
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You can use what you want

Members have posted in the thread their success (or not) with a bottle of techron


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#5 Old 01-26-2017
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Quote:
Originally Posted by Mrots3 View Post
Could I just use sea foam I have been told to use that before to clean up the engine.
Never used it (but thought about it). I've read some good reviews about seafoam and a lot of not-so-good threads about it.

Techron is the rage here {ie: this forum; if you can get it). I don't because it's not generally available here.

Alternatives (for us Northerners) http://www.optimaforums.com/forum/6-...canadians.html
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#6 Old 01-26-2017
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Originally Posted by jbanks15 View Post

also check the fuse for it
Where would the fuse be?
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#7 Old 01-26-2017
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https://www.slkworld.com/165914-post13.html

might not have one or uses a combo fuse with other components

just go to walmart and buy a bottle of techron, but has to be added to a near empty tank


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#8 Old 02-22-2017
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UPDATE: After about two years the car final gave me a code. The code is P0460 Fuel Level Sensor A Circuit. I am going to see what I can do about the float and the circuit if anyone could give me any info on the sensor.
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#9 Old 03-13-2017
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This may sound a bit weird but when my fuel gauge stopped working I traced it back to the dash wiring harness not being clipped back in properly after changing dash bulbs.

Have you been behind the dash recently ???
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#10 Old 03-24-2017
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Hallo,

Exact the same happened to me this afternoon. Replaced bulbs in the cluster and the fuel gauge was at 0.
The lock of the left connector did not "grabbed" the receptacle from the cluster. Reconnected, all normal.

GRZ Eric.
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#11 Old 04-12-2017
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No I never took apart the dash.
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#12 Old 04-12-2017
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The codes don't lie. Replace fuel level sensor.
A1705420317 SENDER UNIT
Replaced by: A 170 542 07 17 -
A1705420717 SENDER UNIT
Replaced by: A 170 542 10 17 -
A1705421017
Replaced by: A 170 542 14 17

So it looks as though part # A 170 542 14 17 which is $207.50 on mercedespartscenter.com
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