99CEEFOURTHREE

I've had my 99 C43 for about two months now.It has performed flawlessly since and the previous owner religiously serviced it,tranny rebuild,ETC.But i expected more out of it performance wise as i thought the car felt sluggish.Well.... did the ECU pedal reset sunday and jumped on the parkway for a 50 min ride to my family.This car turned into a beast,I mean much more aggressive 30-120 acceleration. From a start it will spin the tires for a good 15 feet then hook up and rocket off! I love it! So I assume the computer will learn my more aggressive driving habits and adjust accordingly right? Anyone know how long this "program" lasts in the puter,do I have to periodically reset the ecu for optimal perf? THIS IS FUNNNNN

PJmak

Please post how you did this

99CEEFOURTHREE

ECU RESET AS FOLLOWS 1.TURN KEY TO ON POSITION. 2.FLOOR ACCELERATOR HOLD FOR 5 SECONDS, TURN KEY TO OFF POSITION DO NOT REMOVE KEY RELEASE ACCELERATOR .DO NOT OPEN DOOR WINDOWS ETC.3.WAIT 2-3 MIN.FOR COMPUTER TO RESET.Start car drive aggressively for approx 10 miles.The computer will 'tailor' itself for a more aggressive performace.This worked very well on my car and you can definatly feel the difference especially if the car has been driven lazily for a whil.Like A SHOT IN THE A@@!!

Vicious_c43

Kewl! I read more about this...I'll be reseting my ECU afterwork today, I'm already pump.

trinitony

I've done this on my E55; but don't you also have to turn the steering from side to side?

John-in-Dallas

I thought that it was only the transimission program that would "learn" from driving style and adjust. Personally, I've never noticed any changes in the progamming as a result of my driving. The transmission always upshifts too soon for my taste, especially if I want to accelerate a bit hard by rolling into the throttle. Of course it stays in the gear until redline if it's floored immediately. It's a sort of all or nothing proposition.

The C43 is a hot rodded motor in an almost classic sense, in that it has a longer duration cam, but no variable valve timing. As such, it lacks some bottom end punch, but comes on strong above 3K RPM. Could it be that after the "reset", you drove the car hard, unleashing the power that was there all along? In other words, when you weren't flooring it, it upshifted too soon and dropped you out of the power band and it felt a bit sluggish...

It's fun to drive shifting manually, in that gear 2, 3, 4 section of the shifter, finding that performance between cruise and floored to redline mode.

ECTurboGSX

It definitely does more than the TCU. It also has an impact on the throttle response, which always feels sluggish on a Benz. I'm not sure in terms of fuel mapping or timing if it has any impact there.

PJmak

Transmission and brakes are driver adaptive on these cars

The ecu reset basically made the tranny shift better\faster

Vicious_c43

Nope dont need to turn the steering from side to side. I Followed the step and it worked "WOW' what a difference the car shifted faster and better...this is very kewl!

LawRens

Best part is, it's not complex and annoying to reset the learning process. So every month if you feel the car becomes sluggish and laggy, just get in the car 5 minutes earlier to do it!

BLKCLK550

i always reset my ECU if i am doing a run against one of my friends, car shifts a lot faster also.

soveit_c43

I know that on most all AMG's theres a thing that is called dino mode? right? ok do we got those on our c43's??? i know the E55 does. ECU reset is cool but wat about dino mode we get that on the c43. anyone know more about the dino mode?? lets talk. heres the step for the dino mode we use at the benz shop. we done this on the E55 and CLK55 AMG



Dyno Mode:
- Insert your key and turn to the 1st position

- Press the trip odometer reset button three times.

- The MFD will then display the battery voltage.

- Press either the up or down arrow until you reach a setting for the Dynamometer Test Mode.

- Using the + or - arrow on the steering wheel, choose the test mode.

- The MFD will then display the disabled safety features of the car, including ABS, ESP...

- Start the car and note all safety features are still disabled.

- To reset, either go through the same procedure and turn off Dyno Mode, or simply turn off and restart the car.
_________________

soveit_c43

so do we got dino mode u think?? im just wondering if the c43 has somethin like that??? i know i done it on the e55 but im askin if anyone heard of it on a c43 or anyone ever found out how..

PJmak

I heard if you pull fuse number 32 out for 30 seconds, itll reset your UCE

Ive done this lol and it seems to have worked

AMG_C36

does this ecu reset work for the c36 as well? or just the 43?

CatButt

There is a post on Benzworld that states womething about flipping the W/S button to reset computer. The guys says it tells how in the manual, but I cannot find it in mine.

Anyone confirm this?

m a x i m u s

this is an interesting piece of info. i gave it a try last night, but have to say that i didn't notice any change whatsoever. either i did something incorrectly or my ecu is already set to the more aggressive driving style mode. my car is, however, not as peppy as i remember it, so i dunno what the deal is.

503C43 ////AMG

Is there some sort of indicator to let me know when the ECU reset? I have seen 2 different ways of doing this ECU reset, I tried them both and didn't really notice a difference. Here is what I did: ECU reset Try #1 1.) Turn key to position #2 2.)hold gas pedal down to full throttle (no pedal click) for 5 seconds 3.) turn key to off and remove key 4.) release gas pedal 5.) wait 3 minutes (don't open doors/windows/locks) ECU reset #2 1.) turn key to position #2 2.)hold gas pedal full throttle (yes pedal click) for 5 seconds 3.) turn key to off and remove key 4.) release gas pedal 5.) wait 3 minutes (don't open doors/windows/locks) Basically the same thing but try #1 was WOT with no peal click and try #2 was with the pedal click. Am I doing something wrong or is there no indicator that the ECU reset?

99CEEFOURTHREE

DO NOT REMOVE KEY AT ANYTIME WHEN RESETTING THE PUTER

m a x i m u s

i know your reply wasn't addressed to me, but fyi, i did not remove the key, and i still didn't feel any difference.

the problem my car has is it feels like it's starting in 2nd gear even though i have it set to summer mode. dunno, maybe im just getting used to the power. it has been several years of driving this car after all!

99CEEFOURTHREE

This definatly works! The previous owner drove the car conservativly and once I reset the car was more responsive off the line spinning tires for a few feet and the tranny upshifts are more aggressive.Now if you always drive your car aggressive you probably wont feel a difference.The computer adapts to your driving style and adjusts accordingly.

m a x i m u s

yeah, i know about the adaptive ecu bit. i suppose mine is already adapted to "aggressive", but the car is definitely not what it used to be. i could barely keep up with a w210 E420 wagon, which had me really miffed. maybe it's time for me to check the airfilters and change the plugs...

99CEEFOURTHREE

Disconnect the battery for 10min reconnect then try the reset.If sluggish ck maf,fuel filter last time you tuned her up?

99CEEFOURTHREE

BTW my car has 136k on the clock and runs like a beast after the reset.Also the car has been maintained to a 't' since new.That definatly helps

m a x i m u s

mafs were changed at 60k (have 93k now). fuel filter changed at 75k. did the A/B services at the stealer up until about 75k. since then, did it twice at my local indie shop. as we know, they dont do any "tuneup" stuff during those A/B services, so i guess ive never had her tuned up, lol. also had brake fluid at about 65k, tranny flush 50, 70, 85k, coolant flush at 65k, but those dont have anything to do with lack of power.

i know im close due for new spark plugs, and ive never changed the air filters (im sure the dealership wdve told me if they did). im gonna try to take a peek this weekend and see whats up with those.