clunk shift happened today so I did the ECU reset where you turn on the key one position and gas pedal to the floor as described in other threads. Didn't correct the problem. I called the service manager and told him he needs to do some research and get back to me. Hasn't yet. OP - What dealership do you use maybe I can have my service dept call them. Sounds like its a known software problem, but I hate to take the car in I just got it. Only 200 miles on the car so maybe it will work itself out. I do notice that when I brake hard that the clunking doesn't happen. It only happens on light braking.

 

Now that you've have reset the tcu, assuming you did it correctly, you need 200 miles of driving to have it smooth out

 

Good to know. 200 miles beats a couple days at the dealer. I'll wait it out and see what happens, thanks!

 

*** UPDATE ***

A couple days at the dealership and they did a software upgrade/reflash and the tranny shifts up and down the way it should. No more hard clunk.

 

Glad it's sorted out.... Come back in a few months and let us know if it is back

 

Just happly received my 16' E63 amg wagon 2 weeks ago.
At about 200 miles of break in I notice a delay in the C setting of the transmission. Lost of power & transmission engagement. Pulled over and stop & restarted the car. Everything work ok. This continues to raise it head after 20 - 25 minutes of driving especially in 3 rd gear. Well tonite it completely took a turn for the bad.
Car bucked & power faded and tranny was stuck in 1st gear. Try the trick of stop & restart fail only to have the Orange engine light come on. Made it home barely. Call customer contact to report problem they will be sending a tow on Tuesday to take to the dealer. My major concerns-the car has 350 miles and this is very disappointing considering what I thought Amg could deliver. Does someone have an advice that would make me feel better about this situation.
Or am I headed to a messy disaster. Ps the car has been driven only in the C mode following the guidelines set by Amg.

 

Don't worry at this point ...your dealer will take care of it

But I totally understand your frustration more than most

 

Thanks. Just surprising that MB would allow this issue to continue to be a blemish on this otherwise wonderful car. I'm getting the feeling that they are aware of this issue and dealing with this as a one to one issue? This could a major issue if you were to pull out and your car stalls in traffic...
But, i see by your posts that you dealt with this and MB worked with you to resolve this issue. Maybe it's why MB in the future is going to a new design 8 speed tranny? After these on going issues.

 

Sad to report problem still persists on my car. Ordeal started night of drive home from dealer(see previous posts) . After multiple (7+) trips to dealer, (car in shop 30+ days since purchase), the original symptom remains, and that is a car shuddering clunk on manual mode downshift from 4 to 3.
This has never been a high rev wot problem, in fact, it occurs at pedestrian speeds and rpms. After getting fed up with no results after last visit, I just took car home and drove it occasionally for a few weeks, repeatedly encountering the problem.
At my wits end, call dealer to report condition remains. Vehicle has 3700 miles on it. After 5 business days in shop, they call and tell me I can take car back, as they have downloaded data and await MB (or AMG?) tech advice. This time however, there was doubt in their reporting to me.
In fact, they told me several folks drove the car (conspicuously absent was the statement "we also felt the clunk") . I went to get my car and return their loaner (they give me a '14 cls every time ) . The slip from them noted "experienced slightly rough shift 2nd into 3rd 2x- data forwarded to MB) WHAT? no mention of 4th down into 3rd in manual mode.
Now the good part. I asked svc mgr if someone would take a ride with me. He asked one of his guys , who turned out to be an office guy . I took him for a ride, tried a few manual upshifts and downshifts, nothing happened. THEN, after car (and tranny) warmed up , clunk on downshift 4th into 3rd (HOORAH!) . Back to the dealer, and this guy is now telling me he does not know if that is a bad thing !!! He goes in to talk to Dealer Ops Mgr, who is busy, and sends him back out with the news for me not to worry, they are awaiting tech report back. I counter that with the slip they gave me that says nothing about the condition I just showed him, and mentions only SLIGHTLY rough shift 2 into 3. That conversation ended, and I was ready to leave, but had one more ace up my sleeve.
Went back into dealership to see salesman I had purchased 2 of these e63s from, asked him to come for a ride. He knows how the cars are supposed to drive. Within 1 mile, he was shocked to feel what I had been reporting all along, as the car did not disappoint, and behaved badly on most of the easy downshifts 4 to 3. Salesman now was driving bus for me. Came back out to tell me to leave car, they have an after sales service rep who will be there later, and they want him to have a test ride.
So I get in my loaner cls and head home. Next step Tuesday next, northeast regional service guru coming to personally inspect car. I have tried to work with MB Corporate in Montvale NJ (anyone ever deal with them??), and that has proven to be an absolutely pointless, and rather mind numbing exercise. (this post probably is mind numbing as well!!) regards-

 

Sounds like you need a new 4/3 clutch pack and a valve body

 

Peter, after 2 software / adaptation attempts to resolve, they did replace the valve body. On ride home from that service, first try to downshift in manual mode 4-3 resulted in a horrible CLUNK....! NOT fixed...

 

Same exact story with my 2014 e550... The clutch pack was replaced and this fixed it

By that point I raised the lemon flag

 

I have researched the NH lemon law, this situation more than qualifies. I ordered this car for myself, and I really like it, but obviously cannot ignore this glaring fault! I have read that you did exercise your lemon law rights? In NH, you file with the state DOJ, a process that is called demand for arbitration. Your claim gets reviewed by the State of New Hampshire New Motor Vehicle arbitration board, made up of both appointed citizens and manufacturer representatives (most likely a legal firm repping MB)

 

First thing I did was go online to better business bureau and filed a complaint against Mbusa, Montvale NJ

They accepted my case but we shortly came to a settlement without court or lawyers or actual filings of lemon

 

Has there been a permanent fix for this? Looks like the software update worked for some but not for others. I just noticed this happening on my car as well.

 

Sad to bump this thread back, but the clunk on downshift is back.... Called the dealer to see if they have any bulletins or software updates on the problem.

 

Any new updates or new cases of this? My 2014 CLS 63 S just started with aggressive clunks on downshifts over the past few days. It feels like it's coming from the rear differential, and is 100% repeatable.

 

first thing to do since it just started for you is reset the tcu

google "reset tcu mbworld"

if persists after 100 miles then take it in

 

This definitely helped. 90% of the shifts are good; downshifting from 5 to 4 seems to be less smooth than the others, but nowhere near the dramatic clunk I was getting across all downshifts prior to the reset.

While I'm happy this worked throughout a 150 mile drive yesterday, I'm still concerned that it happened and that it may happen again.

If it comes back, it seems that the culprits are:

1) Clutch pack
2) Clutch valves (what are these?)
3) New software update; is there a known TCU update that 14's needed?

Thanks for any help.

 

could be the clutch pack but not likely if it's smooth now ... The valve body is the part of the trans that pumps fluid to shift gears ... This historically gets bad after 50k miles on benz's... The tcu update may help too

I had clutch packs and valve body replaced on my 2014 e550 and many many tcu resets with new custom adaptations by the tech