Figured out how to disable Eco start stop
Thread Starter
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Joined: Jul 2018
Posts: 30
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2014 A207
Figured out how to disable Eco start stop
Recently I bought a 2014 E250 Cabriolet. I just love the lines on this car and pretty much everything about it, EXCEPT the start stop function automatically turning on. I live in a rural setting with relatively light traffic, so the need for this functionality is just not there for me. I therefore decided to turn it off.
Scanning the the various websites uncovered many people in a similar situation, where they just wanted to turn it off. But it seems the solution is not simple. Well I have found a solution which is easy to do and will cost you NOTHING!
i will explain what I did and for those of you with other models, you should be able to work it out.
I first got the fuse diagram for my car (found with the spare tyre in the boot) and looked up start stop. This had 3 fuses associated with it, however 2 of those fuses were used by other systems. One of the 3 fuses was ONLY used by start stop, number 91 in my case. I pulled out this fuse and BINGO, no more eco start stop! No check engine light either!
I taped this 10 amp fuse upside down in its normal slot so that I can reconnect the system if I ever need it.
Hope others find this useful.
Scanning the the various websites uncovered many people in a similar situation, where they just wanted to turn it off. But it seems the solution is not simple. Well I have found a solution which is easy to do and will cost you NOTHING!
i will explain what I did and for those of you with other models, you should be able to work it out.
I first got the fuse diagram for my car (found with the spare tyre in the boot) and looked up start stop. This had 3 fuses associated with it, however 2 of those fuses were used by other systems. One of the 3 fuses was ONLY used by start stop, number 91 in my case. I pulled out this fuse and BINGO, no more eco start stop! No check engine light either!
I taped this 10 amp fuse upside down in its normal slot so that I can reconnect the system if I ever need it.
Hope others find this useful.
Super Member
Joined: Nov 2017
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From: Hermosa Beach, California
2018 E400 Coupe
Thread Starter
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Joined: Jul 2018
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2014 A207
Why do you think it odd? It is not st all unusual to protect circuit wiring with fuses. Sometimes a fuse will protect just one circuit. Sometimes a fuse will protect more than one. In this case, it appears that fuse 91 only relates to the start stop circuit. Nothing *odd* about that at all.
i have a 1500km run in the car over the next 2 days. Will see if anything unexpected turns up.
cheers
i have a 1500km run in the car over the next 2 days. Will see if anything unexpected turns up.
cheers
Last edited by Renhoek007; Oct 30, 2018 at 03:44 PM. Reason: More info
Super Member
Joined: Nov 2017
Posts: 669
Likes: 142
From: Hermosa Beach, California
2018 E400 Coupe
Why do you think it odd? It is not st all unusual to protect circuit wiring with fuses. Sometimes a fuse will protect just one circuit. Sometimes a fuse will protect more than one. In this case, it appears that fuse 91 only relates to the start stop circuit. Nothing *odd* about that at all.
i have a 1500km run in the car over the next 2 days. Will see if anything unexpected turns up.
cheers
i have a 1500km run in the car over the next 2 days. Will see if anything unexpected turns up.
cheers
Thread Starter
Junior Member
Joined: Jul 2018
Posts: 30
Likes: 9
2014 A207
Just completed 650km highway and 80km stop start city. Didn’t miss a beat!
Ran the scan tool over the OBD port and no system errors.
Nice
Judge, you need to remain unemotional and objective .
Ran the scan tool over the OBD port and no system errors.
Nice
Judge, you need to remain unemotional and objective .
Last edited by Renhoek007; Oct 31, 2018 at 12:17 AM. Reason: Quote
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Thread Starter
Junior Member
Joined: Jul 2018
Posts: 30
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2014 A207
I explained exactly how I referred to the vehicles fuse schematic to determine which fuses were involved in the stop start system and then logically determining if a single point system fuse existed. By using that logical approach, one could identify the best candidate for interrupting the circuit.
Judge said that I had been “randomly pulling fuses”. Where did that come from? That process was not used in this case. The process I used was logical where candidate fuses were first identified and then analysed. To me, using that phrase, followed up by the suggestion the approach was “foolhardy”, was a sign of an emotional response, aimed at discrediting this work.
Enough on that. So far the car is operating exactly as it was before, but without the ECO light and stop start function initiating on start up. I will be covering another 700km or so again today and will report back my findings, but this is behaving exactly as expected and looking pretty good right now.
cheers
Judge said that I had been “randomly pulling fuses”. Where did that come from? That process was not used in this case. The process I used was logical where candidate fuses were first identified and then analysed. To me, using that phrase, followed up by the suggestion the approach was “foolhardy”, was a sign of an emotional response, aimed at discrediting this work.
Enough on that. So far the car is operating exactly as it was before, but without the ECO light and stop start function initiating on start up. I will be covering another 700km or so again today and will report back my findings, but this is behaving exactly as expected and looking pretty good right now.
cheers
Thread Starter
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2014 A207
regards
Thread Starter
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2014 A207
In my 2014 E250 Cabriolet, fuse 91 is located in the trunk, on the fuse panel next to the auxiliary battery. It is a 10 amp (red) fuse. I will try and get some pics up later today.
cheers
cheers
Thread Starter
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2014 A207
Completed another 700km mixed highway and city driving yesterday. Car continues to operate as normal.
And just a heads up, some markets may have the fuel filter heater also on this circuit. This might be of interest to those that experience very very cold winters. Does not affect me as my minimums never get below -20 deg C.
Cheers
And just a heads up, some markets may have the fuel filter heater also on this circuit. This might be of interest to those that experience very very cold winters. Does not affect me as my minimums never get below -20 deg C.
Cheers
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From: Toronto area, Canada
2018 E400 Coupe C238
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2014 A207
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S204 C250 CDI Sport
Facelift diesel S204 here .
Indeed fuse 91 is the Stop Start but it's also the filter heater that I assume is for warm coolant to heat the fuel filter ?
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2014 A207
Basically correct. The circuit also supplies power to the filter heater element to keep water in the filter from freezing in v cold temps. I had a look around and seems temps less than about minus 5 or 10 deg C with diesel could result in ice formation and possible fuel restriction to the engine if there is water in the fuel. What winter minimums do you get? Is the car garaged? Do you get good quality fuel? These are the questions that will give you an idea as to whether or not to pull the fuse. If affected, Maybe just replace the fuse for dead of winter. It’s easy to try, and is reversible.
My local temps never get that low so no issue. Hope this helps.
cheers
My local temps never get that low so no issue. Hope this helps.
cheers
Last edited by Renhoek007; Dec 16, 2018 at 06:27 AM.
