Battery warranty

[paulgmerc]

Hi. I have a problem with my eco stop start function not working on 2018 glc220d. Took it to my local mercedes dealer to have it checked under warranty. They diagnosed thee problem as a faulty battery. To my horror they refused to replace saying the car was not used for a 4 week period earlier in the year when I was on holiday and that has caused the problem. They are effectively saying you should not use your mercedes to take you to the airport and leave parked up for 4 weeks or your battery warranty and who knows what else will be invalidated. Surely this cannot be correct and is unacceptable I am very upset and annoyed by this revaluation. I am perusing the matter with Mercedes . Any help and advice would be greatly appreciated.

Cheers paulgmerc

 

[DSM10000]

Is there anything in the handbook (or digital equivalent) that states that the car must not be left un-driven fir extended periods?

 

[paulgmerc]

Is there anything in the handbook (or digital equivalent) that states that the car must not be left un-driven fir extended periods?

If there is I cannot find. I have asked mercedes to provide me with the battery warranty conditions but they are a little slow in coming foreword.
Cheers paulgmerc

 

[DSM10000]

If there is I cannot find. I have asked mercedes to provide me with the battery warranty conditions but they are a little slow in coming foreword.
Cheers paulgmerc

Good luck with your battle!

 

[kcsun]

So would using a trickle charger also invalidate the warranty??

kc

 

[Petrol Pete]

Ha ! , here we go again with this stop/start nonsense. A 2018 car can not be left standing for 4 weeks before needing a new battery. What madness.

I have said my piece on here more than once that this stop/start function is probably resposible for more emisions than it saves because -world wide- car batteries are having to be replaced way before they should (I must admit the OP's case is a bit extreme). At the risk of repeating myself no one will ever convince me that it is a useful function.

P.S , If the battery in the OP's car had come from Halfords/eurocarparts instead of Mercedes Benz they would have been offered a replacement battery on day one.

Peace out ... microphone drop...

 

[paulgmerc]

Good luck with your battle!

Thanks

 

[paulgmerc]

Good luck with your battle!

Thanks

So would using a trickle charger also invalidate the warranty??

kc

 

[paulgmerc]

not sure about that although I am looking to make a purchase in the near future. Will check with mercedes but no-doubt they will say only if using one of their devices at vastly inflated price . However that would not solve the problem if car left at airport/seaport etc as no power facilities
Cheers paulgmerc

 

[esscee]

As I put on an earlier thread on this subject, start car then turn off stop/start then turn on audio and adjust volume to suit.
Stop/start is getting to be a bit of a sop to the treehuggers.

 

[paulgmerc]

Ha ! , here we go again with this stop/start nonsense. A 2018 car can not be left standing for 4 weeks before needing a new battery. What madness.

I have said my piece on here more than once that this stop/start function is probably resposible for more emisions than it saves because -world wide- car batteries are having to be replaced way before they should (I must admit the OP's case is a bit extreme). At the risk of repeating myself no one will ever convince me that it is a useful function.

P.S , If the battery in the OP's car had come from Halfords/eurocarparts instead of Mercedes Benz they would have been offered a replacement battery on day one.

Peace out ... microphone drop...

I agree with your observations and comments. If I have to pay for replacement needless to say I will not be using Mercedes.
cheers paulgmerc

 

[grober]

GLC - Interactive Owner's Manual
OWNERS MANUAL on line under
Driving and Parking---Parking----Parking up the vehicle

Parking up the vehicle

If you leave the vehicle parked up for longer than four weeks, the battery may be damaged by exhaustive discharging.

If you leave the vehicle parked up for longer than six weeks, it may suffer from lack of use.

Contact a qualified specialist workshop and seek advice.

That's their get-out clause. Perhaps a main battery isolation device might be the answer, but would that place an unacceptable load on the backup battery or alarm battery? not completely sure how these systems interact as it may vary from model to model. Suffice to say modern Mercedes with their plethora of onboard electronics don't like to be parked up for long periods without trickle charge facilities. Most owners in the know simply take a taxi or shuttle to the airport/ cruise ship terminal and leave their car at home on a charger. Perhaps Mercedes should make this more obvious in their owner literature or even a warning notice under the bonnet??

 

[paulgmerc]

As I put on an earlier thread on this subject, start car then turn off stop/start then turn on audio and adjust volume to suit.
Stop/start is getting to be a bit of a sop to the treehuggers.

Thanks for your input, will be taking your advice.
cheers paulgmerc

 

[paulgmerc]

GLC - Interactive Owner's Manual
OWNERS MANUAL on line under
Driving and Parking---Parking----Parking up the vehicle

Parking up the vehicle

If you leave the vehicle parked up for longer than four weeks, the battery may be damaged by exhaustive discharging.

If you leave the vehicle parked up for longer than six weeks, it may suffer from lack of use.

Contact a qualified specialist workshop and seek advice.

That's their get-out clause. Perhaps a main battery isolation device might be the answer, but would that place an unacceptable load on the backup battery or alarm battery? not completely sure how these systems interact as it may vary from model to model. Suffice to say modern Mercedes with their plethora of onboard electronics don't like to be parked up for long periods without trickle charge facilities. Most owners in the know simply take a taxi or shuttle to the airport/ cruise ship terminal and leave their car at home on a charger. Perhaps Mercedes should make this more obvious in their owner literature.

That is very interesting.i did not see this in the manual. I have previously owned mercedes with similar specs,eco stop start function etc and never had any problems with the battery when left unused for a 4 week period. I agree Mercedes should make this more obvious and should upgrade the battery to make it fit for purpose to cope with demands.
I will pursue my complaint with mercedes and update on forum
Cheers paulgmerc

 

[grober]

Its possible that your particular car has an abnormal parasistic drain on parking up due to one of the many onboard systems not shutting down properly. Something that goes unnoticed during normal overnight parking as with a healthy battery the alternator is always there to make up the deficit the next day? There are so many hidden systems that its impossible to check without the right test equipment but there will be an expected/acceptable/ normal drain range they can check on complete shut down. Its a possibility you could challenge them with but they will probably fall back on their 4 week unused getout clause. Usually they would charge for such a specific customer request for a diagnostic even under warranty without evidence of a fault - said charge normally to be waived if a fault is actually found. You would still need a new battery for this test and you might just end up spending more money with no result. Might be worth a try- you can only ask if they can check for this possibility?

 

[whitenemesis]

How do Mercedes deal with this in the supply and delivery chain? Car will inevitably stand for extended periods between leaving the factory and being sold?

 

[rf065]

Hi. I have a problem with my eco stop start function not working on 2018 glc220d. Took it to my local mercedes dealer to have it checked under warranty. They diagnosed thee problem as a faulty battery. To my horror they refused to replace saying the car was not used for a 4 week period earlier in the year when I was on holiday and that has caused the problem.

More interesting is how they knew?
Did you tell them? Or did they go looking for a reason not to accept liability?

 

[skippyjasper]

How do Mercedes deal with this in the supply and delivery chain? Car will inevitably stand for extended periods between leaving the factory and being sold?

Good question.

I’ll wager there is a relay or fuse that is pulled for cars waiting to be sold.
Maybe that same answer is relevant for a lengthy non-use situation.


Sent from my iPad using Tapatalk

 

[whitenemesis]

Good question.

I’ll wager there is a relay or fuse that is pulled for cars waiting to be sold.
Maybe that same answer is relevant for a lengthy non-use situation.


Sent from my iPad using Tapatalk

Using this approach would mean things like keyless entry or remote locking would be disabled ( not a negative perhaps!) requiring use of the mechanical key and probably the resetting of the windows etc?

 

[barian]

It would be interesting to know what the remote vehicle monitoring on the Mercedes me app reports in these circumstances. I haven't left mine parked for longer than a couple of weeks, at which point it shows a "partly charged" status, as opposed to the normal "fully charged". I don't know what happens if it goes below that state. My wife's BMW will send a warning email if the battery gets too low. As an aside, I don't see how this is related to the stop/start function. It seems to me more to do with the number of power consuming systems that remain active when the vehicle is parked.