Euro 1998 C240 Sport Wagon - ME Motronic contolled all-alu , twin ignition V6

I dis-connected the battery in order to re-set the ECU since I was experiencing diminished performnace - ie; slugish acceleration, engine not pulling over 4K rpm, etc. All else ok.

I dis-connected and re-connected the battery, then re-started the engine : intitial start ok, then within 3 secs goes to very slow idle/barely runs. Acceleration pedal sollicitations have almost no effect. Car can ce re-started many times - no change.

I have to date :

- Checked fuel pressure at fuel dist ramp : ok @ 3.5 bar;
- Checked Air Mass Sensor with volt-meter - seems ok at 1v - 4v;
- Left key in on postion >5min to "re-train" throttle position;
- Dis-connected battery for over 20minutes, and closed elec. circuit by grounding pos. battery lead;

Please help : I am trying to avoid the local Benz Stealership and their $120/HR charges as well as a $200 one-way tow.

Any ideas ? I'm getting desperate... Thanks.

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I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140

How many miles on it?

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....

Had an almost identical problem with my C-280 (1999) I disconnected the battery for 1/2 hour, reconnected and the problems went away.

I tried that twice, even removed my ECU unit (to check part number) for well over an hour, so if it is a re-initialisation issue, Im sure that it's been disconnected long enough to reset the registeres.

I also tried to re-initialise the throttle bt letting the key set "on" for 10 min. then off then start: no change.

__________________
I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140

CORRECTION THAT'S 1998

It's got the all-aluminum, twin plug V6 but in a W202 chassis with factory delivered sport suspension, sport seats and small steering wheel.

I just wish it'd run right no w! :-((

__________________
I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140

Touch the ground/Earth to the Positive Batt+ for 10 seconds or more....with both leads disconnected from the battery...this does the trick on BMW's to reset to factory..It discharges the capacitors in the system and dumps the Adaptive memory .



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[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ]

"A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."

""Touch the ground/Earth to the Positive Batt+ for 10 seconds or more....with both leads disconnected from the battery...""

Thanks, did this twice too, no joy.

__________________
I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140

Just have to step on brake pedal to discharge any residule power.

Turn key Off for 10 sec , On for 30 for relearn and then start.

Without starting the engine, turn the key to the number 2 position for 60 seconds. It may need to relearn the throtle end stops. See how this does and get back to us.

""Without starting the engine, turn the key to the number 2 position for 60 seconds. It may need to relearn the throtle end stops""

Thanks, but I already did that, twice. No joy.

__________________
I'de rather be flying !

Euro C240 Sport Wagon
69 Porsche 911E
76 Cessna Cardinal RG
47 Cessna C140

The fuel brain had adapted to a borderline maf meter. Those adaptations were reset with a disconnected battery.
You may have a bad maf meter. Driving the car may re-adapt.