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Old 07-17-2003, 05:26 PM
ML Dude's Avatar
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Join Date: Mar 2001
Location: Southern California
Posts: 373
Fuel level warning lamp blinking

Today as I pulled into work my low fuel idiot light on the CLK started blinking while the gauge read almost full ( 50mi on a full tank ).

I thought that was another electrical problem but I checked the gas cap and sure enough it was loose. Great I thought, it works as a warning for that too, I was pleased!

However, I went out at lunch and my fuel gauge was reading 1/4 tank! The computer, obviously works off the gauge, said 4.1 gallons in the tank. I asssumed lots of evaporation since I filled up, it's really hot here in sunny southern Kali. Well, after lunch the gauge was on zero!!! Hmmm, fuel leak I thought so I pulled right in to the nearest station. Lo and behold, the tank filled in 2.2 gallons as it should for about 55mi worth of driving.

Now the darn thing is bouncing between zero and full, the computer shows the tank contents dropping like it's leaking out the bottom.......

Anybody ever seen this before? I wonder if it will reset itself after the tank depressurizes again? It's a Cab so I don't think it's the heat, must be used to that...

My search found one guy saying the fuel sensors are a known problem, why not more hits then?
Ed "Don't Benz's just feel better..."

Current wives...
2000 ML430 Skyview "The Mel"
2000 CLK430 Cab "The Cab"
85 300D Turbo "The Diesel"

Past wives...
92 300E
85 190E

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Old 07-17-2003, 05:52 PM
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Join Date: Apr 2001
Location: Jacksonville Florida
Posts: 723
Yes The Fuel Level Sending Units Have Problems on Most all late Mercedes..They Read Empty when full....Ive Done Lots on them!
Take It In To the dealer...There is a Updated Version
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Old 07-18-2003, 12:32 AM
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Join Date: Sep 2002
Location: SEATTLE
Posts: 239
CLK fuel gauge gone nuts?

This exact same scenario happened to my '01 C320 a few months back. And, a friend's '99 CLK430 did the same thing when it was new so you can see it's been going on for a while. This is just another warranty repair.

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