fuel gauge

[bonez]

Hello folks...have a small problem that appeared last week. One day the fuel gauge was reading three quaters full, then when i started the car the day after, she read empty. Only after ten miles down the road the qauge returned
to read full (which was wrong!) Anyway today it reads empty again. I think it may be the fuel sender as even on the computer screen on the dash shows a blank reading. The car is a CLK 55 AMG 208 model (W reg). Anybody out there have any ideas. Thanks

 

[jberks]

I'd agree - probably the sender.

 

[television]

Normally I would agree with Jberks, but in your case you have a left and righthand sensor, that's one in each end of the tank. I think you will have to ask MB about any known problems. You can chack the connections by removing the rear seat and the inspection panel

malcolm

 

[twomercs]

Try This

If you are having trouble with faulty readings on the fuel gauge, there are previous posts which advocate filling up with a few tanks of premium petrol rather than the supermarket gunk. I had problems with the fuel gauge on my 2000 CLK230K, was quoted about £500 for new senders and fitting so tried the above and could not believe it when it worked - I had been having erratic readings for about six months and after two tankfuls the readings went back to normal. This was about 18 months ago, I now still use supermarket fuel but about every sixth tank or so fill up with premium fuel and the readings have been fine. Apparently its something to do with gunk sticking to the end of the electrodes and premium fuel having cleaning agent which supermarket fuel lacks. Try it before changing the senders as I believe the parts alone are round about £200+.

 

[angus falconer]

I had intermitent problems like this with my previous C43. BSG Mercedes reckoned it was one of the two senders.

 

[FELLOW]

Senders

My CLK 320 W208 had the same problem - senders replaced fine since no matter what fuel used.

Why didn't merc recall the cars or offer this service free as it is a known fault!

Anyway try all other cheap options and get someone to pop in the diagnostics first. If the work needs doing try an independent merc dealer as the price of labour will be less.

 

[bunny55]

I had a problem when after filling up my C200 the fuel gauge didn't move from full until I'd covered 200 miles.

Then 3 days later it stayed on empty despite there being at least half a tank in it. Then it started working again !!

Bottle of STP fuel cleaner (£15), fuel gauge now works a treat, and it appears to behave correctly from full to empty.

Graham