[NTT]

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.

 

[olmate]

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

 

[ShaGLA45]

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?

 

[strafe1]

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.

 

[nightscar]

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.

 

[Ketan Kothari]

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.

 

[TwoAlpha]

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.

 

[TwoAlpha]

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*

 

[Dany Bernier]

I have the same problem... Since I brought my GLA back in the shop, they performed a software upgrade that made driving my GLA much more fun in sports mode, it's finally gripping the road and revs up nicely.

The problem is that going from parking to the first gear and slowly accelerating into the second, the "BOOM" noise happens every time I leave my driveway at work. I can't reproduce any other place but that specific location.

It seems like the way my car is parked, the way it hits a bump and then "BOOM"... Called the dealer again today and it's going back in the shop.

It does drive nice, but now I really want a fix for this, I fear to break something every time it happens.

Service said it could be a defective solenoid... Will have to see if the computer recorded the event.

 

[nightscar]

If it happens every often and in that spot, it might help to try and video tape it and to show your dealership.

 

[bikerbob]

Rebellion throttle response system

Some one on this forum has installed the Rebellion Throttle Respons sysytem o their AMG 45.
Throttle Response System for the A/CLA/GLA 45 AMG - Rebellion Automotive

Can you tell me how easy or difficult the install was, and how seamlessly it affects acceleration and response?
I'm eager to try it, unless my dealer can update my tranny software to fix the hesitation.

 

[AMGz]

To bad that company didn't seem to post any power charts to see the before and after, that's something that'd help us and them sell the product.

People want to see those details.

 

[TwoAlpha]

This has become a repeatable issue for me at this point. Dealer requested video which they have sent to MB.

Here's what happened last night; GLA had been parked in my garage for about 12 hours. Cold engine, cold transmission. Started, shifted into reverse, gave it gas and nothing. Shifted back into park, waited a few seconds, shifted back into reverse and had same issue. Dealer suspected maybe the parking pawl wasn't disengaging, but as you can see from the video I'm actually moving backwards ever so slightly.

Because the shift is usually violent (you'll hear my tires chirp here), I was feathering the throttle slightly until it engaged. You'll know when it finally shifts

This is getting really frustrating and I hope MB gets back to me with a solution soon.

https://www.youtube.com/watch?v=30Br13feuDw

 

[olmate]

Some one on this forum has installed the Rebellion Throttle Respons sysytem o their AMG 45.
Throttle Response System for the A/CLA/GLA 45 AMG - Rebellion Automotive

Can you tell me how easy or difficult the install was, and how seamlessly it affects acceleration and response?
I'm eager to try it, unless my dealer can update my tranny software to fix the hesitation.

Hello bikerbob

I put a Rebellion stage 1 tune in my 45 and it fixed the throttle response, its a lot more cost but its a lot more power >
the tune is pretty easy to fit if you don't have fat fingers :|

 

[nightscar]

Does it void warranty?

It's cheap enough to be tempting for a try but I am not sure if there are big risks with it.

Like almost too good to be true?

 

[olmate]

Does it void warranty?

It's cheap enough to be tempting for a try but I am not sure if there are big risks with it.

Like almost too good to be true?

mate they will look for anything to void the warranty but if i caused an accident because of NO throttle response i would be going to see some (NO WIN NO PAY)lawyers
The main reason i got the tune was for the NO throttle response

 

[crabman]

What I've been reading seems to imply that they are not specifically looking for tunes. In other words people go in and get mundane warranty work with no ill effects because they are not checking for tunes as part of the process. I have yet to find an instance of someone getting major work done such as a blown transmission with a tune and seeing if they skated through or not either here or on the CLA forums. It is very possible they have ways to check this that are not used in the normal day to day. I've ran into a couple instances of cars that used mechanical means to measure rail pressure (a simple pop off valve that let go at a preset pressure) and one that measured boost (a secondary boost meter) both of which were built into the engine to detect tunes. Does the Merc have similar? I don't know, haven't seen proofs to indicate either yes or no. It is important though to remember that the proof isn't out there till the first guy goes down in flames and reports such on the internet. Or not.

To be sure, remember to take the thing off before you go in, several people have reported having their car flagged by MB after going in with a tuning box and what that means is usually a voiding of the warranty on the entire powertrain. If you want to play the mod game the conventional wisdom is simple. You should be capable of and prepared to be your own warranty station.

 

[nightscar]

mate they will look for anything to void the warranty but if i caused an accident because of NO throttle response i would be going to see some (NO WIN NO PAY)lawyers
The main reason i got the tune was for the NO throttle response

Well my question also concerns maintenance work and whether it'll be detected and then they'll find more reason to charge you.

I mean yes throttle response is sluggish at times but it can't really be that dangerous or else there'd be a line of disgruntled buyers lining up to sue them. The tranny is used in the CLA too and MB has sold a ton of them, if the throttle truly is a safety issue, I think there would tons of report on it by now to a point where MB would be recalling them left and right.

 

[TwoAlpha]

GLA is at the dealer again this morning. The lead tech, shop foreman, and Service Manager all saw the new video and said "yup, that's messed up".

They are sending the video to MB and gave me a fully loaded GLK while they work this out.

 

[Tim]

Transmission shifted into limp mode twice in the last 10 days. Both times traveling over 70 mph in the rain and floored the throttle. I had to pull over turn the car off and back on then everything ran fine except I have a check engine light. I checked the oil, coolant gas cap. All of those are fine. I have an appointment next week has anybody had a similar issue? I have about 12,000 miles on the car