Sorry, now I feel like a spammer posting so much in a row, lol, but I want to be helpful to those that may be unsure how these things work (as I was at one point also).

This module is a OBD flash device, meaning that it doesn't need to stay plugged into your OBD port.

You will plug it into your OBD port, following the providers instructions, which will write some code into your cars applicable logic stream. This happens fairly quickly, then you unplug the module and throw it in your sock drawer where it will probably live until you die, until a family member finds it in your sock drawer and wonders... WTF is this thing!?

 

Im not pushing anyone one way or the other, its your own choise. One favorites the technical side the other takes the easy side. I can only tell you that on my '21 w221 350BT i pulled the same connector as TS drove at least 3 years and 120K with it and it never ever had any issues with the , still original '12, alternator, battery, backupbattery or other systems.
And i used it as a taxi, so allót of starting, hopping in and out and all the things who come with it. I saw that obd sollution but as you know the obd port on a w221 is close to the left foot and seeing that thing reminded me of the stupid Mercedes-Me adapter wich i continiously touched with my shoe. And that thing was even smaller.

 

****. Me. Dead.
You rubes really pay $150 USD for some black box butchery hack rather than disable Eco the correct method through coding via DAS/XENTRY, Vediamo or DTS Monaco?
There really is one born every minute and this forum is full of them! Suckers, that is.

 

Here's a follow-up on the $0 fix.

Five years later, and this soluition continues to work great. No annoying start/stop, reduced wear on the starter. If there's a small hit to overall gas mileage, I haven't noticed it. As before, no wires cut and still 100% reversible.

 

Another disadvantage of the autostart feature is increased turbo wear, on those models having a turbocharger.

 

I ran my '19 G550 for about 3 years with the disconnected battery sensor in order to disable *** without experiencing any problems. About 6 months ago, I coded *** off with a Launch Elite 2 MB scanner, and reconnected the battery sensor. Mild hybrids might not allow either disable method.

 

So there is all sorts of ways to go about the Bosch "Engine Cut Off" feature...

1. stock frequent heatsoaks
2. use OBD $150 plugin dongle
3. use MB Vediamo programing
4. use $150 Launch scanner "Variant" coding steps.

I hardly ever used ECO on my car... I remember having a MB loaner one time in a rush hour traffic crawl... car must have restarted 10 times to drive the distance of one city-block .
Engine hardly running at all to circulate coolant
A/C blowing cold inside and hot onto radiator

 

Six-year update. Still disconnected. Still a $0 change. Still 100% reversible. No negative effects detectable.

 

I had mine disconnected also for about 4 years with no detrimental consequences. I coded mine permanently off, however, once I acquired a scanner that could do this, and the scanner no longer reports a defective battery sensor.

 

May I take your order?

Yes, I will take the free lunch!

 

This can also be accomplished by programming an IC sized Arduino to pulse a momentary contact closure on the disable button line five seconds after startup. This exactly replicates the driver pushing the button. No messing with the car computer. Retains ability to turn it back on. No unplugging the battery sensor.
I can do this, don't know when I'll have time. Plenty on here can program this, it's the simplest program one could write.... an output pulse after a five second wait. Two lines of code.

 

When I acquired my G550 6 years ago, the lane keeping assist (LKA) and auto start/stop (***) were greatly annoying and (IMO), hazardous. Even though both could be disabled -- LKA by means of a dashboard button and *** by shifting into Sport -- neither disable was permanent, requiring re-disabling upon each car re-start. I disabled *** by disconnecting the battery sensor, and disabled LKA through the method you suggest -- a small microcontroller that emulates pushing the disable button upon starting the car. More recently, I permanently disabled *** via coding using a Launch OBD scanner, and reconnected the battery sensor. I think the Launch scanner can also code off the LKA, but my hack still works effectively so I haven't tried the coding method.

 

Easy does it best !

 

Do you mind going in depth on how this is done?

 

I had to pull the headlight switch module out of the dash, and remove the separate module that has the LKA button and Parktronic button (and a couple button blanks for other options -- this switch module is a part used on many MB models). I added a small microcontroller (a PIC10F322 for the geeks out there reading this) that senses when the red indicator LED lights up (the indication that LKA is active) and asserts a signal that emulates pressing the button for 3 seconds. This automatically shuts LKA off every time the car is started and LKA initially activates. As I said, I think the Launch OBD scanner can permanently disable LKA, or alternately configure it to remember the last setting, which is a much easier remedy.

 

Appreciate the detailed walkthrough!

 

Honestly just find a remap shop, I was quoted £25 to disable the feature however it's not possible to configure the feature to be off initially to allow you to turn it on due to how it stores the config memory, it has to be disabled completely which would work you.

You can also get "chip tune" plug in to your ODB to do this yourself.