Yeah I need some details too, like what specific update is it? I would like to bring it to my dealership and be able to tell them exactly which update it is.


I would be pretty happy just to get a quicker launch off a stop. I see these reviews getting better than 4.8sec on 0-60 MB states on the GLA45 but just imagine how much better that time would be if the take off wasn't so sluggish/hesitant?

 

Hello nightstar, do you mean just tramping it or launching race start mode
PIC 1-Here's my race start but it was wet when i did this

PIC-2 Also a Rebellion stage 1 tune in the dry

 

I am actually talking about day to day driving, sometimes from a red alert, it feel like I step on the gas pedal and it takes a second before the car moves. And in Sports Mode, at times it feels more sluggish where you step on the gas and it does nothing and you kind of have to push further and the car just jumps forward.

I am not quite sure why MB doesn't fix it if it is a simple software calibration?

 

I spoke to my wife about this, since i put the Rebellion tune in it doesnt happen anymore
She said before the tune she was very hesitant about pulling out at intersections when cars were coming towards her, she said she puts her foot down and the car goes with no hesitation
I have had aftermarket tunes in my last 3 cars, the extra power is great for the first few weeks but its more about the driveability that i like

Hope this helps you

 

Another update (for those who are interested):

My GLA got a new clutch yesterday. The labor to replace it was.... extensive.

 

Another update (for those who are interested):

My GLA got a new clutch yesterday. The labor to replace it was.... extensive.

That is wild - don't try this at home

 

The parking brake stays on when you shift into gear for safety. Once you apply enough throttle to tell the car you really do want to move, then the parking brake releases. You can overcome this by manually releasing the brake with the release lever.

 

Anyone else experienced an issue similar to this before I bring it in to have it looked at?

The DCT should have a little 'play' in it because it is an automated 'manual' utilizing clutch-packs, however, that sounds like EXCESSIVE play. I would have the dealer check into it. I have not heard of this issue in the CLA forums, so I don't think it's a widespread issue with this particular transmission.

Hopefully it just needs a software update

 

Has there been a case where Benz has done this before? Where they simply update a software to fix such a problem? Because it has been an ongoing issue with the CLA from the beginning and it's been more than a year and they haven't done anything.

MB has mentioned that they fixed the quick shifts from the CLA to the GLA but they didn't seem to address the issue when the car is from a stand still.

 

I would take in straight back to the dealer right away. Transmission problems can only get worse if you continue to drive. Sounds like an electronic timing issue with the computer linked to the transmission.

 

Anyone else experienced an issue similar to this before I bring it in to have it looked at?

Were you able to find out the transmission problem with you GLA? I'm still curious to what could cause transmission problems at such a young age.

 

Sorry for the lack of updates, I've been traveling a ton for work and haven't had the time to bring it in yet. Going to be another week at least before I can get it in.

 

I am experiencing a similar issue with my 2015 GLA45 AMG. When the vehicle is cold and I reverse, drive forward, then reverse again with a little acceleration as in a two-point turn the transmission bangs and the car reacts as though it backed into a wall. The car is at the dealer, but they are unable to duplicate the problem. I am heading in this am to see if I can demonstrate the issue to the dealer.

 

Engine and gearbox software update cured my problem.
Dealer said the update took a long time to complete.

 

So a software update is available on MB dealerships?

 

That's correct. And sorry for late reply. The update completely transformed the car.

 

What do you mean by completely transformed your car?

 

ahhh...ok, i have noticed the same thing on occasions
You have me thinking now, does it happen all the time or first thing when the car is cold, i dont drive the car much but im pretty sure when it happened to me the engine was cold
just a thought....

 

Yah happens often even after the engine gets a proper warm up. I tend to drive in stop and go traffic for about 45-60 minutes each way per day and I experience it almost daily. Tranny is just erratic though, there are time where it rolls smoothly but sometimes it's just hesitant but that might be dependent on the roads incline/decline?

I am really used to it by now though but I still know it's there.

 

we dont drive in stop start traffic so its not a real problem to me
It would be interesting to see what your dealer says though...good luck!!!!

 

I think it is normal. Almost every review on the GLA and CLA has the same complaint.

 

Finally getting around to sharing an update on my original issue.

Now that the MN weather is getting warmer, I am unable to reproduce the hard/violent shifting from P to R, R to D, and P to D. The dealer had it over the weekend (and only put about 10 miles on it) and were not able to reproduce the issue.

There was no mention of a software update, but I also hadn't read this thread to know there was one to ask while I was there.

HOWEVER, I am noticing some of the symptoms of a laggy engagement from a stop, and my shifts from D to R (i.e. when parking) seem to take forever. Now that I'm not traveling for work over the next few weeks I'm going to grab some video and bring the GLA back into the dealer for another look.

 

I had the same result with my GLA 45 AMG - the Dealer was not able to reproduce the problem. But the problem has not recurred. I will drop by the dealer next week and ask about the software update.

 

There were a number of issues

1. The car would select neutral when I turned into a side road, especially when it was downshifting. I narrowly avoided an accident on one occasion.
2. There was a violent jerk just as I was about to bring the car to a complete stop in traffic.
3. I had to depress the accelerator pedal a long way before and movement occurred.

All of the above was cured after the update.

When coming to a complete stop in traffic, it would now stay in 2nd and remain so for a couple of seconds then select 1st, this cured the jerk.

The Accelerator now responded to the slightest input.

The car would also automatically downshift the moment I changed driving modes from ECO to SPORT.

 

Im also experiencing the same violent shift went starting out. I have experienced this in reverse and going forward. Ive only had the car 3 months and brought it back to the dealership. They told me they couldn't duplicate the problem but did the update. This still has not fixed the issue, and to say I'm disappointed is an understatement. Im surprised everyone in the car didn't get whiplash its such a violent shift. Any thoughts on what to try next?

 

For the GLA 45 owners.... I think the issue with hitting the accelerator from a dead stop is a programmed "soft launch". Race start is one function. But "soft launch" is a program that allows the car to build revs and then just go. In the case of the 45's, some models require a hold on the brake, followed by flooring the gas pedal and watching the revs build and hold at about 3k RPM, then release the brake. The GLA in the US does not operate that way. I believe that all you have to do is accelerate hard from a dead stop. When I do this, whether I'm in S, or M mode, i get a soft launch. The car barely moves and the revs build to 3k RPM's and then it just goes. If you accelerate slowly from a stop, this does not happen.
It seems that we have to accelerate slowly to move immediately, but if you accelerate to much, the car will try to soft launch and just sit still. If this is accurate, then I think it would be better to have the soft launch programmed differently because it would be nice to accelerate more briskly and get the car going ASAP.

 

The most frightening experience of this car so far this morning, I think I read someone here had a similar experience?

I was stopped on a light, it turns green and I remove my foot off the brakes and slowly step on the gas and then BOOM something just felt like and sounded like I was rear ended. I quickly looked behind me if I did get rear ended and there was no car behind me. It was just scary experience.

After the loud boom and the car suddenly jumping a bit forward it just ran like it usually does.

~700 miles in the car and it was the first time I've experienced it.

 

Reverse Not Possible!!!

I am also facing issues with the transmission. The car suddenly shows an error 'Reverse not possible; Contact workshop'

The car is only 5 months old and has done only 3300 kms.

 

My GLA is going into the dealer tomorrow morning. I finally have a few incidents of the violent reverse shift on video, and just yesterday I went to accelerate from a green light and the tranny didn't engage until about 2000 rpm, and then lurched forward. Even my wife has noticed that it constantly "hunts" for gears in eco mode. I'm hoping this is software-related because in the past few weeks this has turned into the most awful-driving vehicle I've ever owned.

Expect an update hopefully by Monday.

 

After almost a week of test driving by the techs and the shop foreman, the dealership was unable to replicate the issue with my transmission. Even after seeing the video they acknowledge there might be an issue, but they are unsure as to what to do about it.

No software upgrades available for my particular build either. And of course, the transmission feels fine for me over the past two days.

The dealer did open a case with MB to see if there are any similar issues.

*shrug*