blackbenzz

Anybody try this at the track? One pass no reset and then do the reset and run again? I've never tried the reset but one of these days I will get around to it

ZAHANMA

You know, that is a good thought. I usually reset mine right as I get to the track while I'm letting her cool off. Never thought about if it made any difference w/ or w/o reset between passes.

ScottW911

As I understand the reset, it takes about 40 accelerations (in S mode) from a complete stop, for the computer to adapt to your particular driving style. If you reset at the track, it will be capturing data from a VERY aggressive driving style and should not be negatively affecting your performance. Doing the reset after only a few complete stops is just a waste of time, in my opinion

nathandimond

Okay, it is my understanding that the W203 has an adaptive automatic transmission. I don't have a lead food but I do pull ahead of most cars when I accelerate from a light. I would say I have an eager foot. If this is how I drive from the moment I have the car, why would the throttle response become sluggish over time if the inputs from my food tell it to do otherwise?

c32kompressor

so it takes roughly 40 times of hard acceleration to get a good throttle response??
im lost

W203Ramos

WOOOOOHOOOOOO!!!!!

ScottW911

You've got it backwards. It take roughly 40 accelerations to achieve ultimate sluggishness.

No matter how hard you feel you accelerate, the adatptions will always feel slower that the cleared memory in the computer.

The simplest thing to do is just clear the memory every week or two.

Chip Shams

OMW RIGHT NOW TO TRY THIS

Ken311

just want to give some feedback on my experiences with this little trick.

ill first start by saying that the ECU reset does work! the throttle response, shift points, and low end power all seem to be improved. the car just seems to always pick the best gear for optimal acceleration when coming out of a corner, and the 1-2 shift chirps! Amazing.

another thing i noticed, was my gas mileage went to hell, and not just because of the way i was driving. i reset the ECU and tried driving normally for an entire tank of gas and managed 15.4MPG, while my normal driving on the "unmodified" ECU was almost always between 18-19MPG. i assume this is because the transmission holds the lower gears longer, letting the engine rev out each gear longer, consuming more fuel.

any other theories as to why this is? with gas prices on the rise, i will use the ECU reset for weekend canyon runs and track days. However, the boost it does give is not worth a 3mpg penalty for normal street driving IMO. I'll have to try to this reset for freeway cruising and compare the ECU's to see if there really is something else going on behind the scenes.

-Ken

sjx

Just tried this on my C32.. Definitely a massive difference. I've wondered for a while why it seems so laggy on occasion when IM the one who wants to play.. Thanks for the share

AMG Sleeper

same here!

gnma

Just tried this for the first time and it works!! Thank you for sharing this with us!!

Nachtsturm

Yes, it does.

Did it last night, and you could tell the difference.

Acmar

Hi! I'm new to this group and I've been learning a lot about my E320. Forgive me if this has been already answered but does this reset work on a 2004 E320?


Thanks


Miguel

rrohtake

Awesome!!!

Since I adopted the baby, it's been little over month and I thought the car was supposed to be something like this. WHAT A DIFFERENCE!!! No more sluggish start.

Thanks!!!

ssoutlaw74

Ok so i did the reset, it does work but now my check engine light is on? any one
else have this happin? any ideas the car is Not modded in any way

ScottW911

The reset and the light should not be related. The reset just overrides the user adaptions. It is probably just a coincidence.

Get the codes read and you will see it might be something so simple as a loose gas cap.

ssoutlaw74

Thank you we did just put gas in it , and its only 10 deg out here in indiana
today lol. This is my first Benz and i love it so far .Just a obd2 right? nothing special? ill check it tomorrow and let you know. Thanks again this site really does help newbees have a good experience with these cars!

ssoutlaw74

cyl 4 and 5 miss fire what now? coil packs plugs injector? car runs fine .i drive
a 200 mph race car i would think i would feel a miss fire?

91RS

If it's running fine now just clear them. If they come back, you know you've got a problem.

ssoutlaw74

Thanks to all that answered my call for help... I put new plugs and wires on it cleared codes car has 89k on it original plugs still(wow were they tight)so i figured if i was to pull them out to clean i should just change them.Car runs much better now.The bad thing is while in my shop i figured i should put wheels n tires on it and some carbon fiber to Wife didnt see it that way lol .Again Thanks to all and thanks for a great place to get info!!!!!

pointman

I feel no difference.

pointman

Help a noob out, cause I want this to work.. and I just don't feel it.

doors closed... turn key to where engine isn't running but all cluster is illuminated...

hold down throttle to the kick down for five seconds... turn key off... release throttle.. wait 3 minutes.

Am I missing something? Cause I read all the threads about this.. and I don't think I am.

macbryanie

lol.
Anyway: Is your comand off and the headlights switched off (not auto etc) ?
I only did the reset once so not much more input sorry.

ghiaguy

Mine seems to work fine, the only thing I have read that is different is some say 15 seconds throttle down. Be sure to leave the key in (but turned all the way anti-clockwise or OFF) for the 2-3 minutes of wait, then pull the key and 'exit the vehicle' is another one floating around


& i do always hear the ecu 'thinking' things through after this reset during the 2-3 min wait
then it usually tells me to kill john lennon