Throttle delay
 

Need your help guys,am in dispute with a garage that sold me the C220 cdi sport,it has a delay of about 1-2 secs, is this normal I think it's dangerous but they say it's okay, any ideas folks ?

Reset the throttle, key to position 2, foot on accl pedal for 10 seconds, key to position 1 and then release pedal, do not remove key. Wait 2-5min then drive the car.

Why did you make 2 threads about this?

Sorry Bud,new to all this, is this a known fault with this car ?

Hi Cazmart,

Not a fault, but a characteristic of the way the car is set up. The ECU "learns" the driving behaviour of the driver and, if the last one was a slow driver with gentle inputs to the throttle, the car will respond by teaching the ECU this. Also, with the C220 there is a lot of torque (300 ft/lbs or so standard) going through the transmission at fairly low revs, if its hammered, so the engine management system tries to limit possible damage to it.

The advice given should help it but thought I'd give you this insight as a daily driver of a C220 for nearly 6 years. I found, owning the car from new, that the MB dealer is your friend when you have questions and problems. They know the car better than an independent unless he's been MB trained. Just my thoughts.

Good luck with it. :zoom:

I've had my c220 for over 3 years now and you just have to get used to it. At first I noticed this as well, always a slight delay in the acceleration then it takes off! I think it's down to the power band, between the 1000-1500 rpm, no power there until you hit about 2000rpm then it flies. It has caused me to stall a few times even now when I need to get out of a junction quick and I don't build enough revs.. :hammer::hammer::hammer:

When resetting the throttle is there any indication that it's been reset?

you can change the throttle response level with xentry
both for automatic as manual there are 4 levels and stock its set on the slowest one building up power in stages even when you hit the floor

That's new, I've never heard of that. You've done this already?

not yet, i know someone who has xentry and did it on his CLA and C class so i'll pass by when i have some time to change mine

Not a fault, but put there by design. There are mods you can get to help the issue:

https://www.sprintboosterusa.com/

If you wanted to throw money at it. I just ended up resting my car's settings, and let it "learn" how I drive. I still have a noticeable lag when I leave it in Automatic mode. When using the tiptronic though the lag seems to disappear all together.

Please keep us up to date about this, would be interesting to know.

Thanks for the info folks,tried the throttle reset suggested but it made no difference, Reading through all the threads the general consensus seems to be that that is the way it is, so this being my first Mercedes I will just have to adapt my driving style,thanks again you have saved me a trip and wasted expense going in to my local Dealer,any suggestions in future will be much appreciated. 👍

Then I would try something like sprintbooster or the like, it will preload your throttle so that it feels like it's instant reaction.

I did a reset according to those steps and it worked on mine,at least feels like it.Would you be having some steps did wrong?

a throttle reset does not remote the throttle response delay! it only resets to factory default which is for non AMG's the lowest level.
if you want the same kind of response like BMW you need Xentry to change it to atleast level 2

Spent most of the day reviewing the 'Sprintbooster ',and although £180 is a lot to spend on a gadget,for the symptoms I have, I think this is the item to go for (and it's easy to fit !!),will let you know if it cures it,thanks again everyone for the advice.

Xentry tweak for throttle lag
 

Note - you may not have these settings as they are firmware specific.

Look for Pedalkennlinie (Pedal curve) under ECU module with DAS developer. There will be four settings KLD 1 to 4, KLD1 is default, KLD2 is as far as you will need to go. Most report a huge improvement... (KLD3 and 4 can trigger limp mode)

Looks like a carton of beer heading towards my local dealer ^^^^

Why doesn't someone create a little "programmer" that plugs into the car, and simply changes this setting? Is it not feasible? It would be a very popular product and would work far better than the sprintbooster which can't actually increase throttle response, only throttle sensitivity (it just decreases the distance /curve required to get to the "full throttle" signal from the pedal).

Supposedly TMC has something called Autoflash which plugs into your OBD port and for the most part will reconfigure your TCU and some of your ECU. It's promising better shift time and the lot. Also, Weistec has said they can tune our TCU but you'd have to contact them directly and obviously ship them your TCU.

I think they are pretty much the same thing (Xentry mod and sprintbooster), both modify the pedal curve.

Not quite the same engine as I have a C320CDI but I changed mine from KLD1 to KLD2 and noticed a big improvement. AFAIK KLD3 and KLD4 are model specific and can indeed trigger limp. There is a detailed right up by Scott52 on benzworld.

Here is a screenshot of R171, it was pre set at KLD4

The simple answer for you is it because its a Diesel. Diesel cars are great but if you want that power right off the bat then you need a NA gas car. Diesel has lots of torque but not at low RPMs when you start the car.

They have lots of power to tow things and such, but not for off the line boost.

Even if you jump into the brand new 2014 models which are diesel, you will notice that they are a little bit slower at the start.

? lots of torque = lots of power at low RPM's