Jetfuture

Had my '16 GLC in today for the fuse recall. Apparently there is a recent automatic transmission software update as well. The service writer said there was a "software update" that was due as well and they completed it. The receipt stated it was the AT software.

From day 1 I've noticed that when I drive around a corner and go to press on the accelerator, the car hesitates. It always seemed like a software programming thing to me. I haven't had a chance to check to see if the update cured this. But I will post on here when I notice (while driving).

X253

Mine 2015/10 manufactured GLC. Had the software updated on last service visit ( updated headlamp software, audio20 software and transmission software).
i noticed the following ,
1. Gliding mode (E mode) was disabled on downhill, the shift from gliding mode back to normal was a bit rougher
2. I had problem when about to stop before roundabout then accelerate, car hesitate to move every now and then, i tried to replicate the behaviour but could not( i think when i was about 20km/h at 2nd gear and then accelerates the problem will happen). after software upgrade, the issue seems to be solved?! It did not happen again after good 1 month and I hope the problem will be solved cos it was quite dangerous and disturbing

BmwGLC300

Do you have the AT software revision number? Old and new. thanks

jeffzzz

Hi Jetfuture and X253,

I've just come across this thread, I've had the exact same issue, throttle hesitation at low speed when going over speed bumps or at slow, tight corners. Was very annoying. My July 2017 build GLC (gas/petrol) had its first 'A' service 6 weeks ago, they updated the transmission and engine control software and so far it seems much better. I have noticed it a few times, but nowhere as bad as it was before. Wondering if you guys have seen an improvement? Guess the car is as good as its software

Cheers

X253

From the record , i found 2 code for my GLC software update.
1. SM201711
2. SM201726

BmwGLC300

X253

I asked what kind of update to adaptive headlight and transmission ?! The MB tech said no idea and the update just popped from their company database. I hope the updates will solve problem with headlight ( LHS light on when car parked for unknown reason) and poor response on slow speed ( my experience was on 2nd gear less then 20 km/hr and need to accelerate)

Jetfuture

Ok, I stole the car from my wife and found the transmission update has really improved the aforementioned shifting/hesitation issue. I consider it fixed and no longer a problem. Well done Mercedes-Benz engineering!

Not sure of the new software update version or where to find it. It was not listed on the dealer receipt.

GSOTXL

AH HAH! SO I am not the only one who noticed one headlight turned on on my GLC in the middle of the night! When I mentioned this to my SA at the dealership, he never heard of that issue.

decorily

It will be interesting to see if your wife 'teaches' the car bad habits with her driving style and the previous issues return.

romeodeng007

It's better after the update but I can still feel the little impact when the corner turning with acceleration. However, the update also fix the shift 2-3 impact.

X253

I tried to replicate the poor response after the software update, i never succeded and hopefully it was gone , my feeing was the shift from slow speed was a bit rougher.

X253

I took photos of the issue and sent to the dealer, the dealer said they never heard of it as well, but i doubted !!

pencarrow

I had the software update yesterday, The tech. said "the system has to learn your driving habits." ?????? My drive home was 56 miles,when I turned into my driveway ( where the problem always occurred) it didn't. Soooooo maybe the fix worked.
Cheers
Fritz

decorily

Yes...the gearbox does in fact 'learn' your driving style. This is what I referred to in my earlier post.

millywoods

Thanks a lot for information, was searching for it!