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Discussion Starter · #1 ·
Having had my secondhand GLC 220D for a few weeks now, I am blown away with all the technology, having had CLC, and B series before, from the LED lights which are amazing, to the blind spot and adaptive cruse control.
I do have a number of questions though.
On the steering wheel screen with the MPG there is a charge display, what is this?
The stop/start function rarely activates?
The 12v socket in the front console was not working, I checked the fuse located in the boot! and was ok and swapped with the rear 12v socket fuse still no joy. Took it Merc dealer and they said its not the fuse, surprise! having already told them, so they removed the center console to see if was connected, which was. I was then told I had used a no approved USB socket in it which had blow the fuse!, I said which fuse? Does anyone know of another fuse and what is an approved socket? Still waiting for technician to call me.

Sorry for the long first introduction and questions.
 

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Stop/start will be because your battery is not fully charged.mine works fine but I do quite a lot of 20+ mile journeys
 

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Discussion Starter · #3 ·
Having had my secondhand GLC 220D for a few weeks now, I am blown away with all the technology, having had CLC, and B series before, from the LED lights which are amazing, to the blind spot and adaptive cruse control.
I do have a number of questions though.
On the steering wheel screen with the MPG there is a charge display, what is this?
The stop/start function rarely activates?
The 12v socket in the front console was not working, I checked the fuse located in the boot! and was ok and swapped with the rear 12v socket fuse still no joy. Took it Merc dealer and they said its not the fuse, surprise! having already told them, so they removed the center console to see if was connected, which was. I was then told I had used a no approved USB socket in it which had blow the fuse!, I said which fuse? Does anyone know of another fuse and what is an approved socket? Still waiting for technician to call me.

Sorry for the long first introduction and questions.
Just found an answer for 'charge display'

Recuperation display shows you whether energy has been recuperated from the kinetic energy in overrun mode and saved in the battery. Recuperation display depends on the engine installed and is therefore not available in all vehicles.
 

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Welcome Horizon, great choice of car.

Not sure about your other 2 queries but regarding the stop/start, a few people have said it doesn't work in their cars. It has to reach several criterias before it works, I personally always switch it off when I start the car but if I forget it always works. Hopefully somebody who has had the issue will be able to help regarding sorting it for you.
 

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Discussion Starter · #5 ·
Thanks Learoy, its just on my B-series it work all the time, just use to that. But with the GLC its got a lot more electronics and power drain, I suspect that why its never kicks in very often.
 

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Strange as my new glc stop start works all the time that much I turn it off in heavy traffic as it can be a pain
 

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Strange as my new glc stop start works all the time that much I turn it off in heavy traffic as it can be a pain
+1 ..... in fact stop/start is turned off as soon as I set off!
 

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Everybody can remember their Stop/Start working perfectly when their car was new. I suspect as time goes on the battery's capabilities degrade somewhat and certain criteria required to activate the Stop/Start can no longer be met, hence the facility slowly disappears. At 30 months old, Red Ken permanently displays the "amber light of despair" but I am unconcerned as I have been switching it off manually since day one. The reason it cannot be automatically disabled is because it was required to achieve the official emissions data Mercedes publish when their vehicles were tested. It certainly has very little bearing on the real world fuel economy of the car although you have already paid extra for the uprated starter motor and battery required to support the system. In effect, we are all subsidising Mercedes lies :D
 

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Having had my secondhand GLC 220D for a few weeks now, I am blown away with all the technology, having had CLC, and B series before, from the LED lights which are amazing, to the blind spot and adaptive cruse control.
….

The stop/start function rarely activates?
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Hi Horizon,

Welcome to the GLC club. Yeah the tech onboard is impressive. I moved up from a 17 year old domestic vehicle to the GLC …..it was a step through a stargate!!!


Re: the Start/stop system. A number of parameters have to be in place for this to operate ...battery voltage, a/c settings, operating temps of engine and transmission ..are some ..probably others as well.

I have read on some of the forums that some folk have experienced the start/stop system degrading over time. Resulting in battery replacements under warranty ...usually ….as first attempt to rectify.
Interestingly , some dealer service departments have delved deeper and tracked down a battery earth issue (masquerading as a battery low voltage..maybe). Not sure on the details ..but get your service provider to look into it.

The front console 12v socket is a bit weird!! Don't know. Was it working when your purchased??

Would be interesting if the 2 faults are related !! ..a long shot!!


Phil.
 

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Discussion Starter · #10 ·
Update to 12 volts supply on center console

Well as predicted Technician never called, so I have to chase. Finally had sensible reply. Apparently after removing the front console, the socket was not connected, they then plugged this usb plug in, that I had lying around and it blew the fuse and said it was an unapproved, since when does these things get approved?. So there is no other fuse. Moral of the story is keep asking why? until they give the right answer without all the hogwash.
Also had the battery check reference the Stop/start, and that checked out ok -umm but agree with comment that life battery can degrade.

Interesting reading the notes on invoice they did a Recall update SRPC1838 - Update on diesel engine control unit
 

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Interesting reading the notes on invoice they did a Recall update SRPC1838 - Update on diesel engine control unit
Yup, they have removed their emissions defeat software after the German Transport Ministry sussed them out. As a bonus your engine now also meets the EURO 6b standard so you shouldn't get charged extra for entering emissions controlled areas like Central London.
 

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My GLC 250d had its first service around 2 weeks ago after it broke down on me (see poorly GLC thread). After the repairs and service was done I noticed that my fuel consumption had dropped by around 4-5mpg so I contacted my local MB service manager about it.


He told me that they had updated the diesel software and that the car was 'learning' itself again and would soon be back to normal. Well 2 weeks down the line and its still around 4-5mpg below where it was before the service was carried out.


On top of this today I have noticed that the ADblue which was filled up to 100% during the service only has a range of 6700miles, whereas before it went the full service interval of 15500miles so its defo going to cost more going forward as it will need 2.5 fill ups before the next service.
 

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In the recall notice it clearly states that on a properly maintained vehicle:

....we ensure that the software update has no relevant impact on the certified fuel consumption....
The AdBlue consumption may increase under otherwise comparable driving conditions.
Well Red Ken's 220d engine has shown a real world average fuel consumption of 43.8 mpg since he was new so I would be less than happy to stomach a 10% reduction just to achieve EURO 6b compliance. I'd advise anybody going in for the recall to take a photo of their current fuel consumption information to bolster the inevitable argument. I'd also argue that to accept such a drastic increase in Adblue consumption just to get their fiddled nitrogen oxide emission levels down is wholly unreasonable. Unfortunately the recall is mandatory so if it is not done this may leave the door open to Mercedes potentially refusing other warranty work at a later date. It appears we have all been caught between a rock and a hard place with the uncovering of the illicit Mercedes emissions defeat software.
 

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Get what your saying Toobad but in my case I didn't receive a recall notice and MB just went ahead and did the update without telling me beforehand.


I only got the full picture once I had questioned them on the reduced fuel consumption as I was averaging 44.8mpg from mile one up to the first service. After the service it has dropped to around 39.7mpg so I questioned MB who then came clean and told me they had updated the software and it should return to normal levels after a few weeks of driving.


There has been a couple of instances where it has gone back up to around 42.5mpg, but its mainly down around 39mpg which might be due to the cold weather recently and having the heated seats, screen etc. on all the time. But the Ad blue consumption has definitely gone up by 40% or so.
 

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I only ever get mid to high 30s mpg out of my 250d, never reaches the heady heights of 40+ and had to top up the adblue at under 10k so it's going to hit me when they do an update.
I guess I must push it a bit harder than some of you guys. I run mostly in comfort mode except when I need to get out of a junction quickly but I do very few long runs just occasionally max about 25 miles each way and the rest local so that would likely be a reason.

For anyone who hasn't taken up a service plan I would fill the adblue yourself as it's dead easy and much cheaper than letting the dealer do it. I bought mine from an ebay dealer at £10 for 10 litres but have noticed lately even Halfords and filling stations selling cheaply.
 
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