Mercedes Electrical Faults. Stop Car Leave Engine Running Message

various electrical faults on this mercedes c class 2.1 diesel.
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[@twiz1084]

So the owner of the Merc took his car to more than one garage and they could not diagnose a faulty battery. Where the hell are these mechanics, sorry technicians as I believe they are called now, being trained? Whipsnade zoo by any chance?

[@felixalbion]

Training is poor these days, very basic. They are more like fitters than mechanics.

[@ORileysAutos]

Obviously not a good garage. I know of a few garages in Luton that have literally a wooden shelter with blue tarpaulin as the roof. Work standards are terrible. Coming from me a person who works roadside 😄

[@StelioKontos-wk9km]

A mechanic is only as good as his tools.

[@timhilton2143]

I don't think how good or bad the tools are make them a good mechanic. Yes having the most modern, up to date kit makes diagnosis a lot easier but 99% of diagnostics come from knowledge, experience, common sense and being methodical. A poor mechanic with the best tools is still a poor mechanic. Too many garages are parts fitters replacing parts to see if they are faulty until they hit the bullseye. These are the bad mechanics who don't know how to diagnose properly and sadly the customer takes the hit. I'm amazed at how many cannot even read wiring diagrams or even have an oscilloscope to hand. Rant over, loving the videos BTW.

[@tonychalmers9867]

It's not that most mechanics are useless, it's that anyone can claim to be a mechanic.

[@marksenior9220]

Did you have to program the new battery to the car?

[@sbiable]

Of course you have to! I bet this one will come back in a year with exactly the same problem.

[@ORileysAutos]

This vehicle has no option to reset BMS. only to change the battery size AH

[@Олег5233]

at Ford, the reset is done with fog light buttons and an emergency alarm, but still not enough.

[@StelioKontos-wk9km]

@@sbiablewhat would you know guitar boy

[@ORileysAutos]

@@StelioKontos-wk9km even if it comes back in a year, he has a receipt for the battery with 4 years warranty 😁

[@waynebrinkley6284]

I cant belive they couldn't even diagnose a dead battery, ive found that start stop is the quickest way to kill a battery, had to replace quite a few batteries. Good job as always Jimmy, quite liking the look of the Kingbolen,seems capable of most things .👍

[@markmagee2382]

Who can’t diagnose a faulty battery nowadays, slightest drop and gives all kinds of problems. And don’t don’t don’t put cheapy battery in make sure you put in the correct type of battery in, might be twice the price but you’ll pay more in dopey diagnostics from dopey garages 🤦🏻‍♂️ well done Jimmy

[@bigjml]

Some Mechanics don’t understand that a battery can need replaced even though it starts the car. That fact confuses Mechanics that have not kept up to date with technology. My Jag XJL (X351) was the 1st car I owned (back in 2013) that would have all kinds of electric issues when the battery got discharged fully after an alternator pulley failure. The Jaguar Main Dealer wouldn’t replace the battery and I had all kinds of weird faults afterwards. I tried an overnight trickle charge and it improved a little but a couple of weeks later the battery died completely. I was lucky I had already bought a battery to replace it And this wasn’t a car with Stop/Start and only had one battery. I don’t think it was an AGM battery though, the later Stop/Start models had two batteries.

[@herrkiwi3110]

It's amazing how often the battery is overlooked. You can test them all day long but the most valuable information is the age and how many times has it gone flat.

[@davidnorton5887]

I've found that often just a single time flattening the battery is usually the beginning of the end.

[@felixalbion]

The more electrics and the more emissions systems a vehicle has the more problems they will suffer. And the more and bigger the repair bills. Bring back the simple cars.

[@azerotha4531]

Ive read so many comments saying need to reset BMS, most cars with BMS yes you do however most mercedes and even BMW are self learning, and you only need to re celebrate if your changing the AH from what the manufacturer fitted. I changed one last week cleared all codes went to calibrate BMS with bosh just to see if it was available and got a note saying only needs changing if AH different and needs dealer computer to do it, same battery spec went in so just crack on no issues. Vag group are different you need to put make of battery in, battery type ie efb agm etc, the AH and a serial number lol

[@jamesward5721]

That trackers well hidden. :-)

[@rbondy008]

Genuine question, how did you know nothing electrical was constantly draining the battery, would the scan tool picked up the draw?

[@K3RSHA]

Thanks for this went to a shop and they told me I need a new alternator 🤦🏾‍♀️ you definitely saved me a lot of money 😊

[@raffaelemalara8227]

Seeing newish car does it not require battery reset ! Thank you

[@bobbaxter952]

It's amazing the amount of fault messages a dead battery will throw out there! :-)

[@KingstonHomeMaintenance]

Start stop batteries never last long, id just turn off the start stop option.

[@enesfazlic6017]

You can see it on your scantool Just sitting there its 11.88 V and dropping slowly. It should be sitting at around 12.50 Where did he take the car to get diagnosed?🤦‍♂️🤷‍♂️

[@ORileysAutos]

Of course but I'm just testing to confirm and show the viewers

[@Grahams-Grass]

I was gonna ask the same question. Battery registration?? Seems like a daft place to put a cabin filter right on top of a battery

[@bigjml]

Better than putting it inside the car IMHO

[@herrkiwi3110]

Most late model Mercedes are in that location, the thing to watch is refitting that cabin filter as often the plastic breaks when refitting the clips.

[@Олег5233]

there is a gas outlet tube provided

[@george5022]

Thank you for sharing , Very usefull

[@bobbyphelan6417]

Anything video on 2016 mazda CX-5 diesel engine light fault, seems to come on when the tank goes to half empty and when I fill up it goes after a short while. Then comes on again when tank goes half empty. I replaced the fuel cap with new one.

[@StephenBrown-ti6mm]

Thanks for sharing 👍👍

[@brucefraser4778]

amazing how other repairers didnt sort this, it's very common for a weak battery to cause issues like this, especially so many, the battery health is the first thing i check and most of the time it's the cause, it's shocking how little garages and main dealers know or can be bothered with🙄

[@blowduke]

My evoque had lots of faults turning up from switches not working to lights coming on turned out to be the battery ,was starting car ok but just old

[@Mickytdi]

How was it even starting at 130amps? Mine is at 360 amps and struggles sometimes.

[@ZafiraSteve]

The battery was over 200 quid because Bennetts motor factors are a rip off!

[@ORileysAutos]

Indeed but nothing else in this area

[@ZafiraSteve]

@ORileysAutos true, but MPD and Motorserv ain't a million miles away too be fair. Obviously Bennetts has the monopoly in Biggleswade!

[@brap5829]

When you go to engineering school read the dmn book, do the homework, don't just plug wires together positive to negative that's stooge engineering

[@oldgeezer3269]

Pure Genius 🍀

[@bobr9731]

What are these me mechanics learning. It seems incredible the can't see the 101 diagnose.

[@Chris-jy3dm]

Another success jimmy 👍👍

[@1954307]

great job

[@LondonCarnaval]

I thought that we need to reprogram the new battery to the ecu or ecm 🤔 for it to know the parameters of the new battery 🤔 ? I don't know anymore 😕 I wish you explain to us pls what are the procedures. Thanks a million in advance and kindest regards 😊.

[@ORileysAutos]

Not for this particular car. No option to do so. Only to change battery size

[@gavindixon7892]

Thanks

[@ORileysAutos]

Thank you very much 😊

[@davidnorton5887]

How old was the original battery?

[@SB-pr3gk]

I come across this problem quite a lot on the roadside, yes same scenario “my mechanic just reset the codes but the faults comes back”! After replacement I always reset the battery adaptions. Always an ongoing argument whether you should or not…personally I always do as in most cases the Ah is different to the one fitted prior and it’s good practise to tell the BMS what it’s charging up to etc.

[@sbiable]

Well, you just ruined that battery unless you initiated battery replacement in BMS.

[@herrkiwi3110]

No issues if the battery is the same type AGM AH/RC capacity. Major problems if not.

[@garybrown5500]

Out of interest. Why does it get instantly ruined, sounds like changing a battery is no longer DIY?

[@sbiable]

@@herrkiwi3110 well, BMS shall re-learn battery state over the time but JLR , for example, states that you have to initiate battery replacement in BMS. BMW or VAG give you the option to choose the battery manufacturer in some models.

[@sbiable]

@@garybrown5500 Not instantly but over time it will lose quite a capacity since BMS could not re-learn it properly. All batteries are different, especially from different manufacturers. Especially if you mix Japanese and German ones :) The good thing about Yuasa is that it can be restored to its factory conditions even after 2 or 3 years of use because it is not sealed;)

[@ORileysAutos]

Battery won't be ruined. There is no option to reset BMS. only if you change the size of the battery AH. I checked on the scan tool.

[@TheOriginalDaveJ]

Jimmy, you coulda got yer multimeter out and tested the battery in 10 secs. However, I am aware that you were showcasing additional #LaunchUK products. Interesting all the same that the battery didn't need married to the car.

[@ORileysAutos]

If I just tested a battery with a multimeter I'd get all sorts of cowboy comments

[@oldgeezer3269]

@@ORileysAutos can’t win bud can ya 🤷‍♂️