Stop/start .... again

[EmilysDad]

I always turn it off when I get in the car but I know that fairly recently it worked. However, I realise now that it doesn't. We're away darn sarf at the moment so the car is being used more than it normally does so I would have thought that if anything, the parameters for it to kick in would be more easily met. Today I've driven about 60 miles of mostly rural roads, the last 15/20 with ECO on, & it's remained orange .... never tried to turn green.
Whilst I'm not worried, I'm curious as to what condition is not being met to make it work. And without guessing ie new battery etc, can the car be interrogated to tell me?
The car is 14 plate with around 75k on the clock.
TIA

 

[malcolm E53 AMG]

The only thing I’ve found that really influences whether S/S becomes active is battery condition and winter running, putting a multimeter across the battery terminals is a good place to start - I thought you’d be pleased lol, mind you I use the the S/S as a battery condition indicator which works well. My battery is 3 years old and the S/S becomes available half a mile after start-up in this weather, I don’t always remember to turn it off so the green light acts as a prompt to me

 

[EmilysDad]

The only thing I’ve found that really influences whether S/S becomes active is battery condition and winter running, putting a multimeter across the battery terminals is a good place to start - I thought you’d be pleased lol, mind you I use the the S/S as a battery condition indicator which works well. My battery is 3 years old and the S/S becomes available half a mile after start-up in this weather, I don’t always remember to turn it off so the green light acts as a prompt to me

As said, .... not too concerned, more curious. My multi-meter is nearly 300 miles away. If it's "just" the main battery, I'll live with it a while.

 

[malcolm E53 AMG]

I find it is the main battery that affects the S/S the auxiliary battery is the original and still shows 12.9V last time I checked it

As said, .... not too concerned, more curious. My multi-meter is nearly 300 miles away. If it's "just" the main battery, I'll live with it a while.

 

[NJS5]

I'm delighted when Stop/Start doesn't work on my cars.

 

[EmilysDad]

I find it is the main battery that affects the S/S the auxiliary battery is the original and still shows 12.9V last time I checked it

I assume it's still the original ... as it lives under my seat it's not easy to see.

 

[ajlsl600]

Open car, get in, turn key, turn off ss is a routine for me. If it never worked again I wud be delighted, esp if it dont bring further dramas just one less crap system to think about or hav to fix..

 

[EmilysDad]

Open car, get in, turn key, turn off ss is a routine for me. If it never worked again I wud be delighted, esp if it dont bring further dramas just one less crap system to think about or hav to fix..

I do the same, that's why i haven't noticed it doesnt work
As above, I'm just curious as to why its stopped stop/starting & if the reason why is a £££££'s main battery, it can stay as it is.

 

[ajlsl600]

I think? It also stops, working, if it's trying to do e regen of dpf,?

 

[supernoodle]

You can see the inhibit reasons in Xentry. iCarsoft does show it for the S212 E250 at least, but as it's as random as S/S itself, it may not for yours.

 

[EmilysDad]

I think? It also stops, working, if it's trying to do e regen of dpf,?

It must've done a regen some time in the past 4 yrs/30odd thousand miles but I've never noticed it doing one. ???
I'll see what my iCarsoft has to say ... if anything

 

[ajlsl600]

My 250 does about every 360 km. If criteria met. Icarsoft will tell you how many km since last regen as you say must have been doing it and you don't notice.

 

[LostKiwi]

How far darn sarf are you?

Welcome to drop in to put star on it or do a battery /voltage test.

 

[EmilysDad]

How far darn sarf are you?

Welcome to drop in to put star on it or do a battery /voltage test.

Sarf of Londinium .... in Canterbury. Thank you for the offer but as it's not causing problems & I'll be towing do you mind if I pass on your generous offer. Thanks though

 

[Chrishazle]

Daughter has a Citroen C4 2016 7 seater 1.6 diesel, start/stop not working, took it to Halfrauds today for a battery/alternator test, showed the supposedly 700CCA amp battery was only 566CCA amps, voltage 12.3, AFAIK it's an AGM battery, Halfrauds battery test says "replace battery", Tayna want about £136 to supply a replacement, Halfrauds about £217 to supply and fit. Guess what I've told her to do!!

 

[harrye500]

I'd go with above advice - seems to be condition of battery. The 213 stays orange mainly nowadays but as others I couldn't care less as I also switch it off. Battery voltage still reading OK but we all know it doesn't take much for our beloved MBs to throw a low voltage wobbly!

 

[EmilysDad]

just put my multi-meter across the battery terminals under the bonnet (not attempting to wrestle under the seat to access the battery) and it's only showing 12.35 volts .... so I reckon that's the problem.

 

[KennyN]

12.35 volts .... so I reckon that's the problem.

I would have thought 12.35v was fine , you wont get much more from a 12V battery or it would be a 13V battery .

A non load test is probably not the best way to check a vehicle battery unless it is showing <12V on a MM in which case it is toast or has a parasitic drain.

The battery may be on the way out but a quick test would be to fully charge the battery and see if the S/S works straight away , if it does then it probably does need replaced as it is only going to get weaker coming into the winter.

K

 

[malcolm E53 AMG]

just put my multi-meter across the battery terminals under the bonnet (not attempting to wrestle under the seat to access the battery) and it's only showing 12.35 volts .... so I reckon that's the problem.

+1 - you know how temperamental MBs are to low voltage

 

[SL63 Mark]

Daughter has a Citroen C4 2016 7 seater 1.6 diesel, start/stop not working, took it to Halfrauds today for a battery/alternator test, showed the supposedly 700CCA amp battery was only 566CCA amps, voltage 12.3, AFAIK it's an AGM battery, Halfrauds battery test says "replace battery", Tayna want about £136 to supply a replacement, Halfrauds about £217 to supply and fit. Guess what I've told her to do!!

I wonder how you test 700CCA, (cold cranking amps) My multimeter only goes up to 10 amps. There must be a way, but it would be a pretty beefy machine.