S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Multiple erratic short circuit to positive errors after changing faulty rear battery

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Old Dec 28, 2025 | 07:35 AM
  #26  
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W221 S500 M273
Today I assembled the new plug for the position sensor, measured if ground is OK etc. I was hoping the poor connection to the Pin1 ground cable was the cause.

Well 3 faults still remain:

P0348 - B6/4 (Left intake camshaft Hall sensor) : Short circuit to positive or open circuit

P0393 - B6/6 (Left exhaust camshaft Hall sensor) : Short circuit to positive or open circuit

P0118 - B11/4 (coolant temperature sensor): Short circuit to positive or open circuit

P2005 disapeared without a trace, allthough I did not touch anything with this sensor yet.

Also the plug B64/4 plug only showed a low voltage on ignition pin1 and 3, which was just over 12V a couple of days ago?! Whats that all about? Bad Ground?

something really seems erraticaly wrong.

I checked both front fuse boxes for blown fuses again. All OK.

By the way engine is still running smoothly, the position sensors data and the coolant temperature data is properly shown in xentry, there does not seem to be an issue from that point of view. But I am hesitant to drive around, as the fan is ON permanently due to the unsolved P0118 coolant sensor problem.

next week I will have the time to check all lines to the ECU as well, just to make sure there is no interruption.

After that I will put my attention to th ECU-check and CGW.





Last edited by Blackstonehd; Dec 28, 2025 at 08:14 AM.
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Old Dec 28, 2025 | 09:13 AM
  #27  
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Originally Posted by BOTUS
just worked out why you think its not above the throttle pedal - if you are LHD, your steering wheel is in the wrong place - which also means the pedals are in the wrong place

Ha, ha, ha…I think you have them in the wrong place. So in UK the throttle is still under right foot though everything else is reversed? This explains why your CGW is above gas pedal while in the CORRECTLY MADE CARS it is above the left foot😜.

But google search still says in the 2006 model it is below floor under the seat.

If OP has it like in mine he should be checking it before spending time with anything else.
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Old Dec 28, 2025 | 09:28 AM
  #28  
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Arrie.... Botus has it in his mind the rest of the world got it wrong by driving on the right side of the road. It filters down from there.
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Old Dec 28, 2025 | 09:36 AM
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Originally Posted by JohnLane
Arrie.... Botus has it in his mind the rest of the world got it wrong by driving on the right side of the road. It filters down from there.
At least you can hold the beer mug in your right hand in the PUBs that are now open also in day time after lunch, which was not the case not that far back…🍺
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Old Dec 28, 2025 | 09:47 AM
  #30  
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W221 S500 M273
Originally Posted by Arrie
Ha, ha, ha…I think you have them in the wrong place. So in UK the throttle is still under right foot though everything else is reversed? This explains why your CGW is above gas pedal while in the CORRECTLY MADE CARS it is above the left foot😜.

But google search still says in the 2006 model it is below floor under the seat.

If OP has it like in mine he should be checking it before spending time with anything else.
well I checked the EPC for my car and it also shows near or under the dashboard left side with a part number A2219006702. I see there is a condensor A0009820404 with it, could this also cause faults without showing?

Thanks for keeping your attention on the CGW and will definately check it as well.

Even if at the end it turns out not the be the cause of my "short to positive", its a valuable info to have it in mind for any other erratic faults!







Last edited by Blackstonehd; Dec 28, 2025 at 10:07 AM.
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Old Dec 28, 2025 | 10:48 AM
  #31  
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Originally Posted by Blackstonehd
well I checked the EPC for my car and it also shows near or under the dashboard left side with a part number A2219006702. I see there is a condensor A0009820404 with it, could this also cause faults without showing?

Thanks for keeping your attention on the CGW and will definately check it as well.

Even if at the end it turns out not the be the cause of my "short to positive", its a valuable info to have it in mind for any other erratic faults!





Just disconnect/reconnect it to see if it changes anything. If it does you have loose pins.
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Old Dec 28, 2025 | 01:25 PM
  #32  
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Originally Posted by JohnLane
Arrie.... Botus has it in his mind the rest of the world got it wrong by driving on the right side of the road. It filters down from there.

I didn't cause it - it was the French

Napoleon mandated driving on the right side of the road to standardize traffic rules in the territories he conquered, as he was left-handed and preferred to attack from the right. This shift was part of a broader trend in Europe during the late 18th century, where many countries began to adopt right-hand driving for consistency and safety.

Napoleon's Influence on Driving Sides

Historical Context

Napoleon Bonaparte played a significant role in the shift to driving on the right side of the road in many European countries. Before his influence, many regions, including France and England, had different practices regarding road traffic.

Reasons for the Change

  • Left-Handed Advantage: Napoleon was left-handed. This allowed him to attack from the right side of the road, which was advantageous during battles.
  • Uniformity Across Territories: As he expanded his empire, Napoleon mandated that all territories under his control adopt right-hand driving. This was part of a broader effort to standardize laws and practices across his empire.
  • Reaction Against Aristocracy: In France, the shift from left to right was also a reaction against the aristocracy. During the French Revolution, the wealthy were encouraged to blend in with the common people, leading to a preference for right-side driving.

Impact of the Change

Napoleon's decree had lasting effects, as many countries that were influenced by his rule adopted right-hand traffic. This change contributed to the global trend where approximately two-thirds of the world now drives on the right side of the road.


contrary to the fact 90% of human's are right handed.... and the left side is the correct side to use
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Old Dec 28, 2025 | 02:11 PM
  #33  
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Originally Posted by BOTUS
I didn't cause it - it was the French

Napoleon mandated driving on the right side of the road to standardize traffic rules in the territories he conquered, as he was left-handed and preferred to attack from the right. This shift was part of a broader trend in Europe during the late 18th century, where many countries began to adopt right-hand driving for consistency and safety.

Napoleon's Influence on Driving Sides

Historical Context

Napoleon Bonaparte played a significant role in the shift to driving on the right side of the road in many European countries. Before his influence, many regions, including France and England, had different practices regarding road traffic.

Reasons for the Change

  • Left-Handed Advantage: Napoleon was left-handed. This allowed him to attack from the right side of the road, which was advantageous during battles.
  • Uniformity Across Territories: As he expanded his empire, Napoleon mandated that all territories under his control adopt right-hand driving. This was part of a broader effort to standardize laws and practices across his empire.
  • Reaction Against Aristocracy: In France, the shift from left to right was also a reaction against the aristocracy. During the French Revolution, the wealthy were encouraged to blend in with the common people, leading to a preference for right-side driving.

Impact of the Change

Napoleon's decree had lasting effects, as many countries that were influenced by his rule adopted right-hand traffic. This change contributed to the global trend where approximately two-thirds of the world now drives on the right side of the road.


contrary to the fact 90% of human's are right handed.... and the left side is the correct side to use
I think this whole left side traffic actually comes from Sweden, i.e., the Vikings that ruled most of the Europe at one time must have done it😳

Why this opinion: the countries that today drive on left, or most of them, had very strong English influence in the past. But Sweden never was under English anything, it was the opposite as Sweden ruled area of England. Still, Sweden had left hand traffic until I think 1968 when they changed.

A funny remnant of this was on SAAB cars that for long time had the windshield wipers mounted backwards.

I don’t know about Japan if they were somehow under English power at some point?

But I think left hand traffic originates from Sweden😂😜🤪
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Old Dec 28, 2025 | 03:33 PM
  #34  
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OK Botus. We’ll blame the French. Easy target.
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Old Dec 29, 2025 | 11:56 AM
  #35  
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Originally Posted by Arrie
Ok,

Did not realize the 2006 model ZGW is under floor below the seat so not that easy to get to and I do not know if it has the same push-pin issue as in my car's ZGW.
The ZGW/CGW lives up under the dash behind the light switch.

They are easily programmed as most of the options can be turned on and off with a mouse click to suit whatever is fitted to the car.

The various CANBUS hubs are under the carpet beneath the front seats, two each side and another under the plate at the front of the passenger footwell. All are prone to water ingress from blocked scuttle and heater box drains. Start here.
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Old Dec 29, 2025 | 11:07 PM
  #36  
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W221 S500 M273
I just got the message from that ECU repair company. They said the faultcodes are not typical for a failing ECU and recommended to focus on the cables or sensors or data of sensors.

As my engine runs smoothly, and the position data of all 4 camshaft sensors show nothing wrong), I am still wondering what this could be?!

next week I will first unplug and plug the CGW/ZGW and check what happens and if there is some moisture inside (allthough I clean the drains regularily). Then take off al the covers to get access to the ECU plug and measure everything from those 3 sensors up to the ECU again. If nothing found I will head for the sensors and change all of them (allthough allready done with B6/4).

Thanks for all the input so far, I hope I can find out whats wrong and fix it and not having to send it to the dealership as xentry recommends testing with a connector kit, which I do not have.



Last edited by Blackstonehd; Dec 29, 2025 at 11:13 PM.
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Old Jan 4, 2026 | 12:48 PM
  #37  
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W221 S500 M273
I could not resolve the fault. Changed the 2 sensors. Fault returns immidiately after deleting and now the 2 sensors show only fixed data when engine is running ( not changing data at the las three digits as the two others). I have no idea what to do next, so I will have to give it to a dealership.

Last edited by Blackstonehd; Jan 4, 2026 at 12:49 PM.
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Old Jan 29, 2026 | 06:14 AM
  #38  
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W221 S500 M273
Originally Posted by Blackstonehd
I could not resolve the fault. Changed the 2 sensors. Fault returns immidiately after deleting and now the 2 sensors show only fixed data when engine is running ( not changing data at the las three digits as the two others). I have no idea what to do next, so I will have to give it to a dealership.
I actually did not gontobthe dealership and had the ECU checked. Long story short: The ECU was cooked! After repair no mor faults!

thanks for all your input, I should have gone for the ECU earlyer as reccommended by a menber, butvat least I know a little mor about cables, possible faults from ZGW and more😅😉👍
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Old Apr 5, 2026 | 06:04 AM
  #39  
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well I never knew this


the USA guys used to make cars with the steering wheel on the correct side... set to play when he discusses it in the ford museum (48 mins in)


Last edited by BOTUS; Apr 5, 2026 at 06:05 AM.
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