hadam

I have 1997 E-420 which has been showing fuel level all the time FULL.

I went and got the fuel level sending unit. I remove the rear lining in trunk (Behinde the back seat, You must access this from trunk. You don't need to remove back seat, just remove lining from trunk which behind back seat under back speaker and motorize sunshade if you have this option) and replace the old level sending unit from fuel tank to new one.

Even after the installing new level sending unit I still get level Full indication on instruement cluster.

Do any one know what else involve or what other part that can be casuing my fuel gauge on instrument cluster to show FULL?

There is 2 wire that goes from fuel sending unit from trunk of the car to driver side front. Whenever I remove this 2 wire connector from fuel level sending unit in trunk (Back of the rear seat) the fuel levle goes to EMPTY and Yellow light comes on to show low fuel level.

Any one have any idea what else can be change to correct this issue where my fuel gauge always shows my tank is FULL even if I have not fuel in tank.

hadam

Today, I remove the instrument cluster and trace the 2 wires Green/White from fuel tank sending unit to all the way at instruement cluster.

All wiring is good, no short.

Any one has any idea what in the hell is wrong? Why my fule gauge shows always full.

I checked my old fuel level sending unit and found that when it is at Empty level the resistance is very high and when it is at Full Level the resistance is very low about 100 ohms.

Do you think that instrument cluster fuel gauge is having problem? I have already change the level sending unit in fuel tank. I bought the replacement sending unit from MB dealer (Not E-bay).

Ohlord, please help.

patrick_y

Possibly broken instrument cluster.

hadam

Is is common to have IC broken? I mean IC can be fualty to make fuel gauge to read always FULL.

As I said when I removed the connector from fuel tank for level sensor, the IC show EMPTY right away.

This tells me IC is reading something.

I finally found the the wiring diagram on my WIS DVD.

Look like wires goes direct from level sensor to IC. It is blue and white wire. I was looking for Green and white wire.

So I will do some more trouble shooting over the weekend.

For a fancy and luxy MB car this type of wiring issue drive you crazy

I am extremly surprise that NO ONE on forum has this issue.

Please review attached.

Please help help help !!!!!!!!!!!!!!!!

hadam

NO luck yet. I may cut the wires on both ends at fuel tank and then at IC and test with new wires.

What a pain. Some pics.

I still have no HELP from FORUM

hadam

Today I finally finsihed my trouble shoting and found that my IC is bad.

I found that WIS drawing is correct. All wiring matched the WIS wiring drawing.

Pin 1&2 on fue level sesnor goes to pin 4&5 on IC connector on fuel gauge side.

Wire color is blue and white, blue is + and white is -.

Did the continuety check and found good continuety and all wires are good.

So, I got bad IC. Only BAD part about my IC that fuel gauge does not work. Some time fuel gauge is fine and other time it shows my fuel is full even though I got only 1-2 gallons left in my tank.

Do you know where I can get IC P/N 210 540 25 48 with VDO 110.008.763/021 ?? For 1997 W210 E-420, built date October 1997. First Sold in US on 11/24/1997.

Also do any one know if some one can fix my IC that having only fuel gauge problem??

Please reply and give me some advice.

See following more pic.

Here is photos of IC part number label





Photos of IC





Photos of wiring check









PLEASE HELP ME !!

hadam

One more note to add regards to fuel level issue.

I read the reading of fuel level in Ohms to compare when my tank almost empty (About 2 gallons left) and when my tank is full (About 18 gallons).

WHEN TANK IS EMPTY (ABOUT 2 GALLONS IN TANK)



WHEN TANK IS FULL (ABOUT 18 GALLONS IN TANK)



This tells me that level sensor is doing is job and problem with IC unit.

Do you know where I can get IC P/N 210 540 25 48 with VDO 110.008.763/021 ?? For 1997 W210 E-420, built date October 1997. First Sold in US on 11/24/1997.

Does any one have this IC or know where to get it or where to send for repair??

patrick_y

If you could live with the broken IC and just refuel a bit more cautiously, you could potentially save yourself a lot of money and time.

The IC has to be bought from the dealer (for odometer reasons) and it costs over $1000!

hadam

I found the used IC for $250, not bought yet, still negotiating price for $100.

I got following question.

Other then Odometer reading that will read 76000 Miles (Instead of my car 134700 miles) any other problem you think I will get.

According to guy who is selling me the used IC telling me that it is plug and play, only thing that will not be right is the milage.

Can some one confirm if he is right??

Also can local Indy shop with STAR DIAG can change my milage on new used IC to match my exisiting IC or I must see the STEALER?

I feel bad and unethical that I will get roll back on mileage

hadam

I am looking for IC for my 1997 E-420. I found many but none match my part number.

Is this from 1998 E-320 IC will work on My 1997 E-420?? They physically looks the same.

1997 Engine 119 verses 1998 E-320 Engine 112, Is this make IC different.

http://cgi.ebay.com/ebaymotors/ws/eB...m=200160688882

My IC P/N 210 540 25 48 with VDO 110.008.763/021

1998 E-320 IC P/N 210 540 94 47 with VDO 110.008.827/025

Please give my some advise.

mbnj

have you tried the instrument cluster repair guy in Taunton Mass, (memory) on the other "pixel problems" threads? They also advertise on ebay, I don't know if they do this work but they repair (cheap) IC's for e320's when the pixels go on models like my e320 2001 wagon.

hadam

The people who offer Pixil fix, don't want to fix level gauge on 1997 W210.

But I am ok now. I fixed the issue with level gauge on IC. All working good.

I was surprise that I did not get any good solid help from this forum. Look like most of the people on this forum does not have IC issues or are not expert on IC.

Here is the link on how to remove the IC if you like, I found on E-bay.

http://www.pixelfehler-behebung.de/b...bauenglish.htm

ohlord

can't use a 98 cluster in a 97 model.Try aurora auto wrecking in seattle,wa.Google web site 800 number ship nationwide,lots of w210 cars.
ohlord

fju2112

hadam, guess i have to be the first to say, good post. it is a shame you had to fight through a lot of it yourself despite your multiple posts & pictures, but good work! if this is a common problem, it should be put in a DIY thread on benzworld.org if one doesn't exist.

hadam

Ohlord thanks for your recommendation. I called the Aurora, they wanted $425 for used IC. I thought it was kind of expensive for 1997 W210

Ohlord I still owe you thanks for OBDII Scanner from Harbor Freight Tools, I bought 2, each only $39.

One in Los Angeles recommended by ZAM2000 was better, they wanted $225 for IC, but I passed them also. Here is link to one recommended by ZAM2000, good people, lots of MB parts. They are much closed to Dodger stadium in Los Angeles. Following is link to their web site.

Thank you ZAM2000,

http://www.alpineautoparts.com/

I will post some more experience I learn with playing with IC later.

Even though I did not get too much help on IC from Forum, but over all I am glade we have this forum.

People like Ohlord, Zam2000, Whity and Skylaw save me over last 3 years of my MB ownership about $7000-6000.

So far I have paid dealer only to do transmission oil change on my 1997 W210 $350 and on my 2001 W210 for service “A” $225.

Other then that I did DIY or DIY with help of my Pilipino and Mexican buddies in beautiful central coast of California, I used their lift to work on my cars.

Thanks all for your support. Please keep posting your W210 problems on this forum, this is the only way we poor (pretend to be rich) people of MB can survive.

efour20

Hadam, what did you do to solve your problem? Thx

Plutoe

You are asking for a response to a six year old statement----------if you have a problem why not restate in a new very current post----good luck!!