ss_ayhan

Hi everybody. I have 2020 c43 she is just only 27k miles. I bought 5 months ago from dealership. I just drop my car dealer to reset and update transmission software because acting weird lower gears. They told me they will replace my transmission under warranty. Did you have this kind of issue before?

C43 Cmac Custer

Wow, I've never seen one go so early 👀...

ss_ayhan

i didn’t have any real issue. I just ask for them to update software. Some times it was acting weird on low gears. They offered me the change under warranty. I surprised also

GermanCarShow

I'll have to check the paperwork, but the original owner of my 2017 c43 had the transmission replaced very early. Maybe less than 5,000 miles?? Something broke and he coasted to a stop on an exit ramp.

DrMattyJK

I had my trans replaced 33k miles. 2020 C43 AMG 9gtronic trans. The 2-1 shift has a defect. I’m not sure if it’s programming / mapping or a defect in mechanical design. Not only is the shift abnormally rough (“normal” for this car), but my stop and go crawl pace driving causes it to get stuck in between gears 2 to 1. I end up in neutral like condition and can’t go.

This occurs in C as well as S mode. Auto stop start off. Sad to say the new trans did not fix it. I am working with Mercedes to develop a plan.

My personal opinion is there is a wider problem with these transmissions. Please report it!

ss_ayhan

I had the problem between 1-2 sometimes. Especially, when it is cold and I am
A careful driver. I never force my car before warm or kick down.
Good to know all this. I will get my car this week probably and I’ll update here.

GermanCarShow

OK, it was at 661 miles!!
The dealership paperwork says: "While driving at highway speed, the transmission shifted into neutral and the instrument cluster displayed 'leave engine running, transmission cooling'. Following that, the transmission would not shift into gear, vehicle towed to workshop." There was a PTSS case opened, so the dealership must have escalated the issue.

Once at the shop, the paperwork continues: "Multiple malfunctions came up in the display including 'cruise control inop'. Also, transmission jerks when shifting from P to D, harsh engagement, bucks/slams when shifting, and vehicle went into reverse or neutral with D selected. Connected battery charger and performed short test, ETC stored faults: P071700 Signal from rpm sensor Turbine Wheel is missing; P073000 Impermissible transmission ratio; P073100 Gear 1 is implausible, or the transmission is slipping; P071514 The rpm sensor Turbine Wheel has an electrical fault. There is a short circuit to ground or an open circuit. Current fault P060C00. There is an internal control unit fault in the central processing unit. Stored events: U012600 Communication with the steering column has a malfunction; P02184B The transmission oil has over temperature."

So, this was some massive failure right out of the gate. At least it was taken care of. I've had the car at the race track twice now (I'm almost at 60,000 miles) and there are no problems with the transmission. The engine and transmission temps in the AMG instrument cluster menu show that everything is well controlled under these harsh circumstances.

W205C43PFL

Oh my! Must be a serious defect. Ya I think your new tranny is free from defect and performing as it should, how hot does your transmission usually go to in just city driving? What was the outside temperature?

W205C43PFL

Can you elaborate what you mean by acting weird? Was it hesitant, jerking, clunking. The dealership might have found a code that approved the transmission replacement, they wouldn't replace it randomly if they haven't found a hardware issue. If you don't mind can you also post the work order for us to see?

ss_ayhan

It was jerking sometimes low gear (1-2) and shaking the car sometimes when i close to stop at red light.
I didn’t get the car yet probably this week. As soon as i got it, i will share

ss_ayhan

Wow this is a serious problem. I am always following the temp. for engine and transmission. Transmission temp usually changing between 130-150.

ss_ayhan

I took the car today. The car is really smooth right now. It is just revved up when shifting the 8th gear once after they changed the transmission then I didn't see any other problem shifting are really smooth.

The reason is the changing transmission When they opened the oil pan they saw some metal pieces then they opened the rear belly to inspect the metal shaves but they didn't find anything so they decided to the change transmission.

Btw, I checked the engine oil when I took the car home ( after cooled down) It is close to the min. Now I'll call them tomorrow again.

W205C43PFL

I see, glad to hear the transmission is shifting smooth.

W205C43PFL

Sorry for the late reply, thanks for your reply to my message but hmmm yes that doesn't sound normal, looking forward to seeing the work order including the new transmission part number and the modules they replaced.

ss_ayhan

here we go;1 725-270-52-18-87 REMAN AUTOMATIC

TRANSMISSION

10 002-989-06-03-12 TRANSMISSION FLUID

4 000-990-39-25 SCREW WITH FEATURE

3 011-990-09-04 CAPSCREW W HEXAL. DRIVE

3 002-990-62-54 HEXAGON NUT

3 000-990-93-06-28 CAP BOLT WITH SOCKET

3 011-990-10-04 CAPSCREW W HEXAL. DRIVE

1 725-271-43-00 INTERMEDIATE PLATE



111,27127 TEST DROVE VEHICLE UNABLE TO DUPLICATE CONCERN. CONNECT SDS ,,AND BATTERY MAINTAINER. FOUND NO CODES IN TRANSMISSION. PERFORMED ENTRY ,,,OF CUSTOMER CONCERN IN IPR. PER SDS REPLACE TRANSMISSION AND INSPECT 111,OIL PAN FOR METAL SHAVINGS. REMOVED REAR BELLY PAN. REMOVED ,TRANSMISSION PAN AND INSPECTED FOR METAL AND FOUND SOME. REMOVED AND ,,REPLACED TRANSMISSION. SWAPPED TORQUE CONVERTER. USING NON TIME PUNCH ,,FLUSHED TRANSMISSION OIL COOLER LINES. CHANGED CODING IN VEDOC FOR NEW ,TRANSMISSION. PERFORMED CODING. PERFORMED STANDSTILL ADAPTATIONS.

,,PERFORMED TORQUE CONV ADAPTATIONS. RE PERFORMED STANDSTILL ADAPTATIONS.

,,CORRECTED FLUID LEVEL. TEST DROVE AND VERIFIED REPAIRS.

W205C43PFL

Thanks for the update and posting the work order. Glad they fixed up everything now enjoy a problem free transmission!

ss_ayhan

Thank you so much!! They recommend me to go easy to transmission around 500-1000 miles.
I really like my car, the sound is good and also nice for daily driving. I waited for W206 and it was disappointing for me after the test drive. I hope I keep her a long time without issue otherwise I don't know what am I going buy if I sell. New cars are really cheap quality and have too much tech stuff that I don't like.

W205C43PFL

I couldn't had agreed more and been there done that, especially agreed with the bolded part. I drove the 2023 C 43 as well (however I want to give it another chance so will be test driving one again but with different options), but the new one to me seems to be a compromise if I do end up getting one in terms of having all the capacitive touch stuff and touchscreens, I hate touchscreens in cars, might or not be a deal breaker on that front alone. For example, I hated it the last test drive but I understand that is how the industry is moving forward. I also might regret selling as well but ya, we'll see what this future holds. I am excited to test the C236 CLE and seeing it in person.