My wife is in the market for a new suv and really fell in love with a few local GLC43痴 that we saw. We池e about ready to pull the trigger on one but after visiting this forum I知 concerned by many of the electrical issues it seems people are having on the 300痴. Is this something specific to the 2023s and GLC 300s or should I be concerned? Last thing I want is for her to be stranded or her safety to be at risk.

 

No issues according to this guy. Apparently you have to own the car to have the proper validation to speak on problems!

I largely muzzled myself for 2+ months in the GLC forum to see if things would improve (they haven't). Do your research and make your own conclusion!

 

I致e had no issues whatsoever. But you need to be aware of all the ways you can wear out the car batteries. Never keep your key fob in the car nor near the car at night. Keep your keys in a faraday bag. When you池e done with the car, follow the directions in the manual to turn off the key (hold your close button and give two taps of the open key). Then you won稚 waste battery power.

 

My GLC suv had one issue a malfunction of the parking lights. Dealer replaced. That's it. I have all the goodies but no sunroof.

As for the key. It's in the car over night & when home during the day. Have never had a problem with the 12 or 24 volt battery. Matter of fact my 2020 never had a problem and the key was left in the car too.

 

A faraday bag is going a bit far but I honestly think Mercedes expected nearly all owners of their luxury branded cars to keep their cars locked and keys far enough away (shocker, I know!).

I think Mercedes is fighting a 48V uphill battle if they think they can force every American to think like they do!

 

Your 2020 wasn't a mild hybrid w/the 48V battery.

 

Well we ended up purchasing the GLC 43 on March 27th and by the 29th it was inoperable...

Even on the first day after bringing the car home and then going for dinner later that evening I noticed some issues with the transmission. Taking off from a stop light required a lot of throttle and the transmission would be rough. Going up inclines at slow speed the transmission seemed to be confused about which gear to shift into (driven in comfort mode). And then when reversing the car did not want to reverse slowly and would buck and judder. I tried not to think about it too much and put it down to maybe not being used to the throttle sensitivity driving a new car but I knew it was wrong - my other cars are a GT3 and F8 so I feel I have experience with sensitive throttles. The next day I drove the car and I didn't experience as many issues but still noticed a jerky reverse gear.

Then on Friday the 29th my wife took her mom out to shop and after a few hours when they wanted to leave the car would not start and kept flashing a "Fob not Found" error. She could unlock and lock the car and turn on the display and play music and charge her phone but the car just refused to start, even after placing the key in the designated area in the console. I thought maybe it was just the key so I left work early and brought the second key but still no dice. Tried everything for an hour and couldn't get it to crank. To make matters worse the car was parked in an underground garage so not easy to tow out.

Thankfully the dealer sent a GLE350 as a loaner so I could go home and it drives MUCH smoother. None of the transmission issues I noticed in the GLC. I still don't know what is wrong with the GLC and not even sure if they were able to get the car out of the garage (tried to forget about it over Easter) but the experience after two days has been BAD.

 

Sorry for your experience but can't say I'm surprised.

Was this a brand new car or used?

 

Brand new 7 mile car.
I'm sure the starting issue is something stupid (i hope) but of course my wife has already lost confidence in the car.

 

Please keep us posted and let us know how the dealer manages to get your car out of the underground garage! I suspect it may be 48V related...

 

Hopefully she's not reading these threads or you'll get a healthy dose of "I told you so"!

 

Any update on your situation, OP?

 

Nope. Hope to find out more today.

 

Was this the 2024 GLC AMG 43?

 

Yes had 9 miles on the clock when we bought it. Apparently some key lock module is supposed to be delivered today which they think will solve the issue. Let's see...

 

Aww ya'll will be fine, it isn't an AMG anyway

 

I'd be surprised if that fixes it (still think its 48V related) but keep us posted!

 

I had my 4 door modules updated last month and it solved my 12v battery problems. Good chance it will do the same for you. Nothing to do with the 48v part of the system. I have never read anywhere that the 48v causes a problem and these days the 48v is commonly used by various manufacturers (Volvo etc.).
Also, I don稚 believe the key itself is a problem because it has a motion sensor built in that shuts it off after two minutes. That is probably why it costs a king痴 ransom to buy one if you loose it.

 

I had the same done to my car and it stopped to throw "discharged" message every week. Yesterday though I randomly checked the app and it was showing "Partially Charged" instead of charged. I will keep monitoring

 

Is this a common change the service advisor will be aware of? Getting to the right person at the dealership has been a disaster and I've had to speak to the sales advisor who has been useless.

 

Also anyone have any experience with the transmission issues I referenced? Not being smooth upon take off and bucking in reverse?

 

I believe my MB service dept. found the door module software update by communicating with MB headquarters. It must be a known, although new, fix because I read about it in another forum. I read where MB were going to replace the door modules but they were on back order so they came up with a software update instead of a hardware replacement.

 

@haitham.said, has your GLC been sitting in that underground garage the whole time? I'd be worried about the battery being discharged since March 29!

 

No they were able to get it out of the garage on the 30th and its been sitting at the dealership since then. I was having trouble getting in touch with the GM or anyone in the service department until I sent a final email saying that I was going to be in touch with MB North America.

It sounds like the module was delivered and installed yesterday so they were able to start the car but while doing the QC test drive the car shifted into neutral on its own again while driving - this also happened to me the first night I had the car but I wasn't sure if I accidentally hit the stalk or not. This is an incredibly concerning and dangerous development. Honestly, the car not starting could have saved mine or my wife's life if this car was going to shift into neutral on the highway.

At this point I have zero confidence in this car and am VERY worried that no matter what quick fix they try to do to the transmission that this will still be a safety concern. I knew I should have bought another brand.

 

Assuming your next car won't be a Mercedes, what will you consider next?