S350 Longterm Maintenance Issues?
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S350 BT 4MATIC
Actually, it may have something to do with the amount of accessories, as I have only 1 large battery and it is a large one in the front of the car. I had to take out the rear seats and all the trunk paneling to get the Fridge retrofitted, and there is definitely room for an extra battery, but my car does not have one. My car does not have the rear seat package, which seems like it would require a lot of power when added to the rest of the car's resident electrical clients.
Last edited by Nuru; Jul 25, 2016 at 11:18 PM.
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S350 BT 4MATIC
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S350 BT 4MATIC
[QUOTE=tode;64 I have removed the trunk paneling, the rear seats to retrofit a Fridge into my car, there is no second battery in the car's rear. The place where it it would go just has harnesses, wires, the Rear SAM located beneath the Fuse holder tray. See the attached pic, I would imagine the second battery would be placed in the open space to the right of the Rear SAM (in center with Fuse tray on top of it) in my car.
Anyone have a pic of the second battery in a 2010+ car?
Anyone have a pic of the second battery in a 2010+ car?
Last edited by Nuru; Jul 8, 2015 at 12:22 AM.
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From: NW France
W214 E300e
It's on the bottom right, behind the rear panelling of the trunk.
It doesn't appear to be diesel-connected, since petrol (gas) S classes have one as well.
I believe it's fitted when the car has the Eco Stop-Start function, which is standard over here, but may be optional in the US (?).
It doesn't appear to be diesel-connected, since petrol (gas) S classes have one as well.
I believe it's fitted when the car has the Eco Stop-Start function, which is standard over here, but may be optional in the US (?).
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From: USA
W140 Mercedes S350, W221 S550 sport
It's gotta be something on European models only. There is no start/stop feature on US 2010-2013's thank goodness. I'd have it disabled as it drives me nuts. I'm 99.9% sure no 10-13 USA based W221's have a 2nd battery. The real question is, why did they remove it. I'd love to know.
Last edited by Jason B; Jul 8, 2015 at 11:57 AM.
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S350 BT 4MATIC
Ok, within the last 2 weeks, the last N0x sensor replaced had to be replaced again. it may have been an error in part numbers as the sensor failed prematurely and had to be replaced. All good now.
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S350 BT 4MATIC
Anyone with an S350 have this experience?
I was driving the car for the second time today and all of a sudden, I could not accelerate past 60 mph, and the car while in gear would rev to 3500 rpm and then act like the electronic governor was kicking in. Once I stopped the car and restarted, everything was ok. I received no alarms, idiot lights, or error codes?
Any suggestions
I was driving the car for the second time today and all of a sudden, I could not accelerate past 60 mph, and the car while in gear would rev to 3500 rpm and then act like the electronic governor was kicking in. Once I stopped the car and restarted, everything was ok. I received no alarms, idiot lights, or error codes?
Any suggestions
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S350 BT 4MATIC
additional symptoms are:
I put the car in Distronics assist mode and it switched to "Distronic Override" and as I went down a hill it gradually sped up. Once it was at a good speed, I could set Distronic and it held that speed. However, when I got off the freeway it went back into the slow mode where the car would only accelerate slowly up to 40 - 50 mph and then no further - rpms no higher than 1500 to 2000. When not in gear it will rev freely when in that defective mode. When in that mode, I can shut the car off and then turn it back on, and it acts like a reset and works normally. The defective mode has only shown itself to come on when I am accelerating up this one inclined road very soon after startup. This mode has only started happening in the last 2 weeks. It did not manifest itself in the previous time I have had the car.
I put the car in Distronics assist mode and it switched to "Distronic Override" and as I went down a hill it gradually sped up. Once it was at a good speed, I could set Distronic and it held that speed. However, when I got off the freeway it went back into the slow mode where the car would only accelerate slowly up to 40 - 50 mph and then no further - rpms no higher than 1500 to 2000. When not in gear it will rev freely when in that defective mode. When in that mode, I can shut the car off and then turn it back on, and it acts like a reset and works normally. The defective mode has only shown itself to come on when I am accelerating up this one inclined road very soon after startup. This mode has only started happening in the last 2 weeks. It did not manifest itself in the previous time I have had the car.
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S350 BT 4MATIC
In thinking about this two things stick out in my mind:
Faulty potentiometer on the gas pedal - Faulty gas pedal, fixing to go.
Turbo could have an issue and the system is trying to protect it by shutting certain things down.
Faulty potentiometer on the gas pedal - Faulty gas pedal, fixing to go.
Turbo could have an issue and the system is trying to protect it by shutting certain things down.
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If no check engine light - it is a Clogged fuel filter. Remember- there is no throttle body and there is no vacuum in the Diesel engine. Rpms are controlled by the amount of fuel injected into the cylinders.
This is very common. Especially if you are in a habit of using regular diesel fuel and put in biodiesel- which has high detergent characteristics and will scrape sludge from fuel system which and the goo ends up in fuel filter.
Once shut off sludge goes to bottom of fuel filter and then takes some time to clog again once the engine is restarted.
It could be many other things but a clogged fuel filter is most often the culprit. Throttle rheostats go bad, but can easily be troubleshot with star/ das.
On batteries- 07-09 have 3 batteries- under hood, in trunk and a small battery under dash. 10-13 have two batteries (under hood and under dash) unless diesel which still has 3 batteries.
This is very common. Especially if you are in a habit of using regular diesel fuel and put in biodiesel- which has high detergent characteristics and will scrape sludge from fuel system which and the goo ends up in fuel filter.
Once shut off sludge goes to bottom of fuel filter and then takes some time to clog again once the engine is restarted.
It could be many other things but a clogged fuel filter is most often the culprit. Throttle rheostats go bad, but can easily be troubleshot with star/ das.
On batteries- 07-09 have 3 batteries- under hood, in trunk and a small battery under dash. 10-13 have two batteries (under hood and under dash) unless diesel which still has 3 batteries.
Last edited by alx; Jul 16, 2016 at 11:13 PM.
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S350 BT 4MATIC
If no check engine light - it is a Clogged fuel filter. Remember- there is no throttle body and there is no vacuum in the Diesel engine. Rpms are controlled by the amount of fuel injected into the cylinders.
This is very common. Especially if you are in a habit of using regular diesel fuel and put in biodiesel- which has high deterrent characteristics and will scrape sludge from fuel system which and the goo ends up in fuel filter.
Once shut off sludge goes to bottom of fuel filter and then takes some time to clog again once the engine is restarted.
It could be many other things but a clogged fuel filter is most often the culprit. Throttle rheostats go bad, but can easily be troubleshot with star/ das.
On batteries- 07-09 have 3 batteries- under hood, in trunk and a small battery under dash. 10-13 have two batteries (under hood and under dash) unless diesel which still has 3 batteries.
This is very common. Especially if you are in a habit of using regular diesel fuel and put in biodiesel- which has high deterrent characteristics and will scrape sludge from fuel system which and the goo ends up in fuel filter.
Once shut off sludge goes to bottom of fuel filter and then takes some time to clog again once the engine is restarted.
It could be many other things but a clogged fuel filter is most often the culprit. Throttle rheostats go bad, but can easily be troubleshot with star/ das.
On batteries- 07-09 have 3 batteries- under hood, in trunk and a small battery under dash. 10-13 have two batteries (under hood and under dash) unless diesel which still has 3 batteries.
Really weird, as once the car turned off and right back on, the issue goes away, today it went away and then resurfaced while I was driving and forced Distronic to drop speed down to 40 mph until I started going into an declining road, then the car could slowly accelerate, and then Distronic was able to temporarily hold the speed, then it drop again when I started going up the hill.
That fits the fuels filter scenario, but initially I noticed this symptom occurred once within 2 minutes after starting the car the first time during the day and would not show it self again after the restart, even with multiple stops where I would leave the car for a few hours and then come back to restart it?
My car has only the large battery and the small one under the dash.
I am hoping it is something pretty simple and once I find out I will report back here to let everyone know.
Last edited by Nuru; Jul 16, 2016 at 11:05 PM.
Maybe the fuel filter
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S350 BT 4MATIC
i have a dealer within 8 miles and i have great independents (with former MB techs who are experienced with the Developer's mode and the prohibited menu) within 7 miles. so I have no worries.
Last edited by Nuru; Jul 24, 2016 at 03:08 PM.
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2013 S550 4Matic
Have you ruled out your electronic accelerator pedal?
I had a problem with my electronic accelerator pedal in a 55,000 lb coach going down a mountain pass. When I released the pedal it would not fully go back to zero and thus the Jake brake would not come on. Coming down the mountain with only the fading service brakes was a nail biter. There is very little engine braking in a diesel.
It turns out that shutting the engine off and on again renormalized the accelerator pedal input to the ECU and everything was fine again. I just did not know that coming down the mountain.
Since you get normal behavior after you turn off the engine, you might try lifting the accelerator pedal fully and cleaning the mechanism.
I had a problem with my electronic accelerator pedal in a 55,000 lb coach going down a mountain pass. When I released the pedal it would not fully go back to zero and thus the Jake brake would not come on. Coming down the mountain with only the fading service brakes was a nail biter. There is very little engine braking in a diesel.
It turns out that shutting the engine off and on again renormalized the accelerator pedal input to the ECU and everything was fine again. I just did not know that coming down the mountain.
Since you get normal behavior after you turn off the engine, you might try lifting the accelerator pedal fully and cleaning the mechanism.
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S350 BT 4MATIC
Have you ruled out your electronic accelerator pedal?
I had a problem with my electronic accelerator pedal in a 55,000 lb coach going down a mountain pass. When I released the pedal it would not fully go back to zero and thus the Jake brake would not come on. Coming down the mountain with only the fading service brakes was a nail biter. There is very little engine braking in a diesel.
It turns out that shutting the engine off and on again renormalized the accelerator pedal input to the ECU and everything was fine again. I just did not know that coming down the mountain.
Since you get normal behavior after you turn off the engine, you might try lifting the accelerator pedal fully and cleaning the mechanism.
I had a problem with my electronic accelerator pedal in a 55,000 lb coach going down a mountain pass. When I released the pedal it would not fully go back to zero and thus the Jake brake would not come on. Coming down the mountain with only the fading service brakes was a nail biter. There is very little engine braking in a diesel.
It turns out that shutting the engine off and on again renormalized the accelerator pedal input to the ECU and everything was fine again. I just did not know that coming down the mountain.
Since you get normal behavior after you turn off the engine, you might try lifting the accelerator pedal fully and cleaning the mechanism.
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S350 BT 4MATIC
Latest Update - one of the tubes (downstream charged air hose) that transports charged air from the turbo to the engine is leaking and it has to be replaced. Since it is a wear item is it not covered by the warranty <$700 installed. It is on the back of the engine in a very tight spot.
Last edited by Nuru; Jul 26, 2016 at 06:46 PM.
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2013 S550 4Matic
I'm surprised MBZ considers this a wear item.
Is it this hose?
http://www.mbpartsworld.com/p/Merced...215281582.html
$104
Losing charge air would cause performance loss but hard to believe a leaking hose would fix itself when you restart the car.
Is it this hose?
http://www.mbpartsworld.com/p/Merced...215281582.html
$104
Losing charge air would cause performance loss but hard to believe a leaking hose would fix itself when you restart the car.
Last edited by gsholz; Jul 26, 2016 at 10:31 PM.
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S350 BT 4MATIC
Yep, that is the part. I found it for $54 from a source in Europe that ships to the USA, and I also found it for $83 at getmercedesparts.com. I was surprised too, but it is supposed to be a flexible high heat tolerant hose, not a metal pipe, and some Manufacturer's cover some hoses and a lot of them don't. When the computer detects it has a leak, it won't let the turbo boost. Seems that sometimes when the car is accelerated on an incline the leak gets to the point where the computer can detect it and then it cuts the turbo, and wallah, no boost, no acceleration beyond 50 mph.
Last edited by Nuru; Jul 27, 2016 at 12:21 AM.
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S350 BT 4MATIC
Oh, well, it is actually ok, I have has a few issues, but nothing that would have hit my wallet hard enough to make me scream "I am going back to the E-class!", well not yet at least LOL!. One does not purchase one of these cars used without knowing the risk.
