Aussie_E350_Wag

Hey Guys,

Partners 2013 facelift E350 wagon has suddenly developed a weird issue whereby when you are stopped and press the throttle it will momentarily cut power like your foot slipped off the peddle it then regains and goes again.

Only does it randomly, maybe 3-4 times on a 30min trip in traffic.

Has anyone else experienced this one, we have access to a very good Snap-On Scanner but I haven't had a chance to see what codes its throwing out.

Cheers!

juanmor40

Please scan, and report codes.

Mileage?

PeterUbers

Could just need a new accelerator pedal such as


https://mbworld.org/forums/e-class-w...al-sensor.html


https://www.ebay.com/itm/15505893666...mis&media=COPY

pierrejoliat

There is a reset procedure, might try that before replacing it.

Aussie_E350_Wag

Could you point me to the reset steps please?

S-Prihadi

Use a scanner and check the low pressure fuel pressure.
Mild fuel choking can do that too.
If 2013 and done good distance, by today its so small 30 grams dirt holding fuel filter element would be dirty enough.

pierrejoliat

1. get in car and close doors.
2. Turn key to pos 2 or press start button twice.
3. Floor the gas pedal and hold 10s.
4. Turn key off.
5. Release gas pedal.
6. Wait two minutes. Do not touch anything, DO NOT OPEN DOORS. TIME IT!!! Two minutes.
7. Open door.
8. Done.

Aussie_E350_Wag

THANK YOU!!

I will give this a go when she comes home tonight,

Cheers!!

pierrejoliat

I might try it twice if necessary, but you may need a new pedal assembly, I believe this resets the transmission memory too, but I'm not sure.

CaliBenzDriver

it sounds like what you describe is a delayed response from stop during acceleration, right?

Does this involve releasing brake HOLD ?
or restarting from an Engine Cut Off sequence?


Let's see what the FAULT scanner reports...


Any Pedal or throttle fault would trigger an instantaneous limp-mode. Bosch does not joke with these two particular controls.
I've had the funny-pin pedal recalled on my facelift within 3 Mo. of factory production... meaning prior years used the amazing loose pins pedal until they had enough field data.


I can see a "whole car reboot" may come in handy to troubleshoot "SAM/ECU insanity" when you're ready.

G'day mate
🤞



The Commonwealth Royal couple prior to coronation - Windsor Castle.

S-Prihadi

Are you now on the land part of the cruise Cali ?
Send my regards to Charlie ( Charles ) .....

CaliBenzDriver

​​​​​​Yes Master Surya, we got off the ship after 9 ports of call in :

• Southern/Northern Ireland,
• Lowlands/Highlands of Scotland,
• D-Day Normandy landing region and
• 3-Days extra tour of Southern UK region: London city Stonehenge, Roman Bath city...

We stayed in each location only a limited time but this was a good breath of fresh air after the flippin' Covid madness.
Foreign currency prices were still in US Dollar's favor despite inflation.
The visited cities are highly organized with world-class train stations, services, restaurants spread.


Tour of British isles ports of call


A1 authentic"pipe major": great any times, good or bad. 👏


Stonehenge settlement:

5,000Yrs. old early settlement 👍

There is a lot of history to see in this United Anglo-Saxon Kingdom. The British empire once ruled the world through its maritime network of colonies.
Thus visiting major port cities by ship was an excellent way to discover local history. The ports of Southampton, Belfast, Edinburgh... were central hubs.



More about the Bosch transportation empire...

Tour coach amazing "LIN bumper T° sensor" 😄

Just like many stock MB's, big tour coach had the delayed tranny shifts (confused late shift timings, banging downshifts).
Poor driveability control make it unsmooth to drive over hilly terrain.
Such as : Not enough power, kick-down shift, too much power, braking 15T bus load...

Can the maintenance sector benefit from better tools... indeed absolutely!
😁

We got into over 15 Uber MB Vito VANs to accommodate our group of 18 traveling friends.
About half of them have in-synch responsive tranny, the other half hard to drive delayed throttle response.

None seem to suffer from our "low-voltage yoyo"... as witnessed by a quick window up/down test. MB Taxis use ECO cycles all day around London traffic crawl. It seems to work well on their leased vans.

I kindly helped spread my practical gospel to regain sanity from the engineered Bosch chaos. It's a bit overwhelming to witness the extent of this amazing CAN problem. I can't believe this is all under the radar.

I did manage not to find idle time to study my homework schematics... it's my next course!


> REMEDIAL... FORWARD THOUGHTS:
"We can't expect, what we can't inspect!"

Imagine if we could have visibility over the Gateway Queue Depth inside the F-SAM...
that could directly let you compare with normal numbers or average expected values. From that a fault color scheme can be used Red/Green for a simple "CAN Good/Bad" idiot flag - IT'S ALL THAT'S MISSING!
An once of intelligence to help out.
🙏

High retransmit rates caused by various errors flood the pipes regardless of priority scheme. (Ex: In traffic jams even emergency vehicles get stuck regardless of any priority).

By measuring flow-rates, we can easily gain extended visibility of performance road blocks, traffic jams, bottle necks...

What I am going to do about this pickle is the same as "3¢ solderless"... I am going to FIX from module to module this time for selected "VIP HARNESS IMPROVEMENTS"... 5¢ with inflation.

Once a problem is defined we can poke, fix and test drive.

Some help to uncan complexities:

Example in above video include noisy pump control causing CAN issues...


noise shielding !!

3-Phases power lines are nicely SHIELDED!!!
Small world, isn't it?
✌️

​​

pierrejoliat

Glad you're enjoying yourself Cali, always great to explore the United Kingdom,

S-Prihadi

Sorry out of topic.
There are 2 destinations in Europe I wanted to do, but have not done so.

1st - I want to go to Guiness Stout factory in Dublin https://www.getyourguide.com/guinnes...ehouse-s10928/
I want to drink this creamy beauty as fresh as it can be.... YUM YUM YUM.

2nd - I want to go to Nurburgring Circuit Germany.
I want to ride its ring taxi in different cars, Bimmer Ms and McLaren kinda cars.
And then I want to rent a Bimmer M3 and do some laps on my own when I am already more familiar, prefer with a seasoned driver to be as my guide as
this track is quite tricky for its elevation change and while at a corner ( as per the RF2 simulator I used to play ) and the youtube I seen Pro-s doing the lap.




Good land tour you are having Cali....Sweeeeettttt

ChrisHimself

pedal sensor aka the accelerator pedal.

Did em on two cars of the 3 I have. Dirt and moisture accumulates and the internals just get worn over time. It's 10 minutes of install.

Aussie_E350_Wag

So would that be the module here on the side of the peddle box?

It's weird I've scanned the car a couple of times an zero errors relating to this fault are coming up??

Would you have a name or part number for this module please?

Cheers!

PeterUbers

see post #3, 9, 13 - you buy the whole unit - make sure you get the one compatible with your car

https://www.ebay.com/itm/15505893666...mis&media=COPY

https://www.ebay.com/itm/17503518814...mis&media=COPY

Aussie_E350_Wag

43,000 miles

Snap-On scanner shows zero codes associated with throttle ??

CaliBenzDriver

Good for you, mate 👍

That's why we sort of insisted to have you scan the vehicle, instead of guessing blindly.

That pedal circuitry is under serious scrutiny by the Bosch ECU for perfect data integrity.

The pedal position sensor is a state of the art CONTACTLESS dual-circuits sensor - It's good to work like new for decades.........

unless mfg decide to use the amazing loose harness pins in recalled units or
painted GND circuit reference or
noisy harness crosstalk or
....
No accelerator code : no problem !

Sounds like something else is at play here.

We need to help you describe that issue to catch it.... hook up your scanner and go test drive until you pick up clues to focuss on.

🤞

CaliBenzDriver

These wonderful high-maintenance cars can be a little too demanding at times for our schedule...

If you're interested in cutting your needless Mercedes troubles short: PERFORM A CAR REBOOT.


While I was traveling around the UK, both my batteries were disconnected. I drove my Benz around yesterday and surprisingly it worked well and did not smell buring oil like it always does since new. What a surprise this was...

I am thinking to install a pair of battery disconnects to give it quick-luck before trips (refresh soft-crashed F-SAM!)

Give that a shot and report.
🤞

The big question is....:
What is so readily upsetting the state of the art multicore CPU F-SAM Gateway manufactured by Robert Bosch company ?

Until we find the fix, use the simple workaround to sweetten your ownership.

Chevota

Not sure if we experienced the same thing but my car has occasionally done that and it was the catalyst spark retard. It severely retards spark timing in Cat mode, at idle, then when you want to go it takes a sec for it to undo it. So you gas it, it's too retarded to make much power, then spark returns instantly and boom your power returns along with it. Very annoying so I disabled it. I don't think it's supposed to do that, but mine did.

OBD codes don't work for me because I have codes and no issues or issues and no codes, so pretty much useless (for me). So if you have trouble figuring it out I'd buy a cheapo OBD dongle ($10 translucent blue one on Amazon) and the Torque Pro app ($5?) so you can record the gas pedal position, throttle position, spark, fuel etc. Then when it happens you can go back and look at the charts for that moment and see if something is not doing what it's supposed be doing. It's a nice toy to have either way, and lots of data to look at, if you're into that sort of thing. It'll tell you estimated torque, rpm, speed, camshaft positions, manifold pressure, air/fuel ratio etc.

Note your gas pedal only requests power, the ecu has to process that and actually open the throttle for you, along with fuel and correct spark. So if it's late in doing that, or I should say later than normal because it's always delayed. Or if the fuel is delayed or who knows what, it'll cause similar issues.
I believe the pedal has more than one circuit to feed position data, at least mine does. I believe that's how it tells if something is wrong, if they don't match.

I've done the pedal reset, which is actually supposed to be a tranny driving mode reset, but never noticed any change. Certainly doesn't hurt to try, but fyi if no change. The full reset via battery disconnect is a great go-to. Like any electronic device, especially computers, the first thing you do when you have issues is restart it

Aussie_E350_Wag

Thanks for the info.

How long do I disconnect both batteries for?

Cheers!

Aussie_E350_Wag

I'm thinking as I have 2 identical E350 Wagons i will swap my good peddle into her car and see if that fixes it and if my working perfectly car suddenly starts having issues.

PeterUbers

excellent idea

Chevota

Not sure how long to disconnect the battery for. I think a few minutes should be plenty but I've read some cars need hours or over night. I guess I'd do overnight if it's not a big deal, otherwise do whatever you can.
Apparently the time issue is some modules can hold voltage in a cap(s) for xx time so they're not reset until drained down far enough. Which, or if any, MB modules do that I can't say.

Then afterwards everything may work fine, or you may have lost some things. For me I usually lose the memory position for the left rear window, so when I close the door it's ~1/4" or so open. I have Coupe so they open when you open that much when you open the door, then roll up when you close it. So I think that function is affected and it doesn't know where closed is? That 1/4" is just the usual amount, it varies and one time it opened about 3".
The reset procedure is opening the window while holding the button down and keep holding for 5 sec after it stops, then repeat on the up stroke. This is claimed to tell the module; "hey stupid, this is where fully open and closed is" since it can't figure it out on its own. I've found that on mine it doesn't need 5 sec, 2 sec works, and I only need to do the up stroke. It doesn't always work either so I do the reset and as soon as I let off the button it opens again. I may do it five or so times and nothing, and give up, then the next day I do it once and it works. Go figure.
Another is I lose the folding mirrors, so I go into the menu and turn that option Off, close out of the menu, turn the ignition Off, then go back in and turn it back On and it usually works. The one time it did not work I tried turning it Off, ignition Off, then I closed the door and locked it. Then got back in turned it back On and they worked. Not sure if the whole locking thing made a difference, but fyi. I don't recall any other issues but my last car I'd lose my radio presets and I think seat memory?

PeterUbers: I see you have an E40 tune. I've been able to go up to 50% Ethanol (mixing E85 and 91) on my car so far and wondered if you're aware of any Ethanol related issues, like the pumps or lines etc being damaged? I hear stories but I wonder if these cars are immune or not? I do it because I get a lot of spark retard on 91 octane, which is all that's available. At ~30% Eth that goes away, and 50% I can add 1.5 deg timing at full load. All stock except the ECU tweaking I do to get it to cooperate on that much Ethanol.
Mine is a '16 E550 Coupe 2wd