1silvermercedes

Hi,

I have a problem with my 2002 C240 and I need some help. Any suggestions are much appreciated.

I have been having problems with my acceleration. It first started when I was making a right hand turn and trying to accelerate so a Ram truck wouldn't run up my @ss. I pressed the gas petal and the car just wouldn't go. I had the petal all the way to the floor and nothing was happening. Then all of the sudden the car just start to go. It has been happening off and on since then, especially at stop lights.

Today an orange triangle appeared on my dashboard when I was pushing the gas petal all the way to the floor. Then all of the sudden the car decided to accelerate and the orange triangle disappeared.

The throttle body valve was cleaned last night and the car is still acting up. Does anyone have any ideas of what might be going on?

Thanks for all your help,

KD

OneOfaKindTrini

Do you have anything like a SprintBooster on your car? It the yellow triangle a CEL?

1silvermercedes

I don't have any aftermarket parts on the car and its an orange triangle, I'm sure.

samaritrey

the orange triangle is for the esp. the car will not let you spin the tires and if it senses any slippage will cut the throttle until it stops. if i hit the throttle to the floor in my c320 the rear end will break loose pretty easily if i am turning or it is damp. i don't think that is what is happening to you because first i think you would notice sliding or spinning of the rear tires and second if you were driving like that you would put two and two together and figure it out. Ok now some questions how many miles, replaced the cps, how new are the tires, location location location, any check engine lights or errors in the ic.

lol i just reread your problem and the first time it actually does sound like you were spinning the wheels and the car cut the throttle to stop it. how long have you had the car if you have not spun the tires before and noticed this that is interesting. my original questions still stand though.

samaritrey

look at page 273 of your owners manual.

1silvermercedes

The tires were not spinning in the rear of the car. I don't drive aggressively when this happens. The tires are brand new and the car has about 79,000 miles.

W203E35

Have you tried to reset the ECU? Give that a shot.

Put key in: 1 click: 2 click: Start
This is legend follow below this.

Put key in the ignition
Turn once (click 1)
Press pedal all the way to the floor (hitting the quickdown)
Hold for 5 sec
Turn the key to off position while holding the pedal all the way down
wait 1-2 sec, Let go of pedal and wait for 2 min for ECU to reset.

DO NOT TAKE OFF THE KEY WHILE WAITING FOR 2 MINUTES

Hopefully this will do somehting. This resets the throttle so hopefully it can fix yoru problem. But I have a feeling it might be something more.

samaritrey

ok back to my original questions then. could be something in the esp is faulty and causing it to cut the throttle or it could be something worse like engine not getting enough fuel or fuel pump or cps or maf or ...

1silvermercedes

Thanks for all the suggestions, I tried the thing with the ECU and I will see if that works. Thanks again.
KD

LILBENZ230

Could this be throttle position sensor or crankshaft position sensor?

acr2001

Your ESP light came on, so this means either:

A. You don't know what you're talking about and one of your wheels WAS spinning.

B. Something is wrong with your ESP system and it's causing the engine to cut out when it's not necessary.

Does the ESP light come on whenever this happens?

jcnash

The TPS and CPS will throw error codes (check engine light)....so unless he forgot to mention the error code...I think we can rule that out.

1silvermercedes

The ESP light only came up on the dashboard once and no the tires were not spinning, I'm not an idiot. There are no error codes present. Today however, I did notice when I rev. the engine at a stop light and then accelerated the car, it tends to respond better. This makes me think it might be a sensor problem. Also when I'm on a flat surface, and I take my foot off the brake, the car doesn't move. I find this wield because before this problem started I'm sure the car would move a bit when I released the brake. Thanks for all the comments.

W203E35

I believe the trottle is responding better because you did a throttle reset "Sneaky ECU Reset".

Do you still get the same problem now? Do you have HID lights? I know some members messed up their ESP unit because they mounted the ballast to close to it.

Might be a bad ESP unit. I am hoping it's not because they cost a good chunk of money.

Good Luck

samaritrey

i didn't even think to ask that this time i must be loosing it

acr2001

Please don't take what I said personally, I wasn't calling you an idiot. It's just that we often get noobs who haven't read their manual and are clueless.

Without any codes I'm not sure what to tell you. I would focus on the ESP module first. Try running the car in dyno mode - if the ESP module is causing the problem then your car will operate normally in dyno mode.

I don't know the code for dyno mode on an 02, so please do a search.

holycaoAMG

Im guessing its the ESP module, but who knows.
From my experience, when i let my foot off the brake on a flate even surface, my car doesnt move either. Im thinking its normal.

jcnash

If its an automatic and its in 'Drive' or 'Reverse', it should roll in the appropriate direction when you lift off the brake!
I think thats common knowledge...maybe im missing some detail here

holycaoAMG

Its an auto, but when im on drive and im at a red light, then i let off the brake to go, the car doesnt move forward at all. It feels and acts exactly like im driving stick.

acr2001

My car does not move forward as quickly as your average car when you let off the brake in gear, but I believe that is how MB designed it. In comfort mode, the car rolls at an idle even less - almost not at all. Are you in comfort mode? Otherwise that seems a little strange.

TemjinX2

does the car go into limp mode or safe mode after you get the esp error? If it does, then its probably a bad throttle actuator.

1silvermercedes

Hi everyone. So I have been working on my car this weekend. I cleaned the MAF sensor and EGR value and the car was running great. Then this morning I get a check engine light on my dashboard. Fun times. I don't think I put the EGR value in right. Does anyone know how to correctly connect the EGR value? I might be missing something but I have no idea. The car runs a lot better however, well at least for now

jcnash

Thats definitely not right.

When in 'S' mode, it should roll slowly (not as aggressively as other cars) provided the surface is level.

When in 'W/C' mode, it should still roll but even slower..

Put the car in Neutral and check your idling RPM..when warmed up my car idles at about 700-800 RPM

dmatre

You say that the tires are brand new - this is probably a clue to what's going on.

Did you change the brand/type/size of the tires, or did you change only 2?

If you have changed the rolling diameter of one axle in relation to the other, the ESP will "sense" wheelspin and apply the brake to stop this.

A co-worker had this happen to him on his BMW 3-series, and his car would come to a complete stop in the intersection when it happened.

Hopefully it's something simple like this. Good luck!

c240MBenz

Hey EVERYONE- I am a newby to the C240 Mercedes Benz world. my issue arrises when my car started lagging as I drove my buddy drove her and said your car doesnt pick up like its supposed to why? After a few hours of driving it she started to litterally not pick up at all then it would pick up out of no where. Well I found this forum and did 3 things things so far from to try to correct the fault. I cleaned and removed the MAF Sensor, I also cleaned the L shaped neck between the MAF sensor and the Throttle body itself, I removed all the lines and inspected them for cracks or missing parts everything seems and looks good no frays or dry rott, i also opened up and cleaned the Throttle body with some Throttle body cleaner and wiped it down. I moved the throttle body flap back and forth to check for sticking or maybe it being 2 loose well it was actually pretty good no sticking no excessive looseness or sign of wear. i added feul cleaner and then added 91 OCTANE fuel to it . I replaced all components and the car is still acting up . The car was driving yesterday ( Mar 5,2012 ) but doesnt drive as of today it acts very irratic and sputters constantly then shuts off. I made a youtube video so you can see personally how it acts when is start it up . i also did reset my ECU like it says above and it didnt do anything. there is no Codes or CEL lights being turned on . the CEL light was on at one point but now its off and it hasnt turned on. please give me any advice or what to look at. http://youtu.be/_OJgC-B7bhA