CLK W208 faulty fuel guage

M

mike5678

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Hi there,

Had my X-reg CLK 230K for about a year now and just had a problem with the fuel guage appear.

Recently it has been telling me I have a little more fuel than I actually have. One incident occured about a week ago where it said I still had 1.0 gallons left, and I was on my way to the petrol station when it cut out. Filled it up and all was well again.

A couple of days ago, I was low of fuel again, went to the station again, filled it up to the brim, turned it back on and the fuel guage went right to the absolute maximum. It stayed there for a good 100 miles. I turned it on and off several times over the last couple of days to see if it would change, but it just often says the opposite. The needle will stay at absolute minumum, not even move up into the warning light area, although the warning light would not come on. On the digital display it will state something like 13 gallons when the needle is showing 100%, and just --:-- when the needle is showing zero.
Just to clarify, both displays will often say 100% at the same time or register nothing at all at the same time.

It does this although I know there is fuel in there as I put more in.

Another thing it has done is go to about 75% and move around that mark. Another time I started it it went to around 50% and then grew to about 75% over the course of my 20 miles journey!

Another thing it has done is be at 0% and then suddenly shoot up to 100% while the engine is running.

Basically it seems completely knackered.

I'm thinking that it is a sensor problem in the fuel tank as the fuel guage seems to work as I guess it is displaying whatever info it is receiving from the sensor, which is all kinds of rubbish!

Other than this the car is in tip top shape.

Any help in what the problem might be, how to fix it, how much it might cost and places to take it? I live in Enfield in North London and work in Wembley in West London so if anyone knows any good places around there?

Here's hoping it will be one of the cheaper repairs as I am absolutely skint!

Any help would be greatly appreciated.
 
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Ellsy Tanners

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There have been a few threads on this subject recently, have a search.

The general concesus is that trying some good qaulity fuel cleaner can help the problem.

Failing that some new tank sender/lever sensors are required. if you are on a tight budget then some cleaner should be your first thing to try.
 

television

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As Elie above put in some RED X or similar this often cleans the float rheostat
 

bigasotonuk

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Hi,
Had similar problem, changed to a super plus unleaded, branded fuel. After a few weeks the problem disappeared (I had been using a branded unleaded fuel).
This does seem to be fairly common, and I think I,m right in saying is cured 9/10 times by fuel cleaner and/or better grade fuel cures it.
 


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