looney100

Is it really that bad? Is it something noticeable immediately? I test drove a 2012 MCT a while back, and don't remember significant lag, and after having read all this I've had another look at the reviews of the E63, and no one seems to complain about lag.

This thread is really making me reconsider the purchase of an E63. Maybe that Tesla should be at the top of my list?

PeterUbers

I didn't notice it until a couple months into ownership during daily driving. You're too excited about all the power and the handling in the first two months that you totally over look it. Tesla has instantaneous throttle and if that's important to you then maybe that's the car you should be looking at. I could never see myself in a Tesla with its inferior interior and boring exterior looks.

I am still enamored with this car, don't get me wrong, but this little thing is quite annoying.

looney100

If I were looking for this and wanted to replicate it during a test drive, what would I do? It happens under part throttle... From a stop, or while cruising?

DATURK

I noticed in my first test drive, but in my thought process, i didn't think nothing of it, well, I was wrong, turns out its a common problem.

Nanook

Coast down to a stop nearly stopping but before actually stopping initiate an acceleration..

PeterUbers

From PL:

Originally Posted by Keyser
That is exactly what the problem I had was like. It is gone. I posted fix and part numbers, and after getting service manager to listen, they swapped pump. Annoying once. Not cool when you die in middle of intersection turning across traffic.

Part number 221-270-01-97 Transmission oil auxiliary pump.

Nanook

Awesome..my ML goes into dealer next monday for windsheild and tires and I'll run this by them..
Pete do you have this post ? from Keyser ?

xxGenericSNxx

http://www.mercedes-amg.com/privatel...=1#post1552901

PeterUbers

Just got first oil change and trans software update ... Will post back if any improvements in shifts

The throttle lag is identical

Nanook

Any comment from them regarding the hesitation ? ..Did you have an opprotunity to mention the pump replacement?
Dissappointing

Nanook

thanks kindly

PeterUbers

My service advisor is as clueless as possible ... "It's working normally it's the nature of the the transmission and since no codes were registered we see no problems"

I'm done thinking about this for today my brain hurts lol

Nanook

Yes the old standard response..." functioning within the parameters of design "

f8ckn that

SilveRT8

I just posted on the PL about my car having the same lag problem.
This should be the case for a TSB

kart125

I dont know if it's a related issue but something weird happenned to me twice last fall. After coming to an almost complete stop and stepping on the gas (was in comfort mode, car not warmed up yet), the car stalled on me... I was quite embarresed sitting in the middle of the intersection with my 100k superwagon with everybody looking at me... Seemed like it took forever to restart the thing.


Last week the almost same situation occured but this time the car did not stall, it was just not responding to pedal input. after a couple of seconds it finally decided to go. It was like it did not know what to do with the throttle input. It always happened in a safe situation but I could not imagine what would have happened if it occured with the 3 kids in the car while turning in front of an oncoming truck.

Nanook

Well at the very least and hopefully it never comes to this..that all of these posts may someday substantiate a legal claim..here's hoping somebody from MB is reading these posts and they bring realization of the potential driving hazard of this condition so MB wakes up and comes up with a fix

PeterUbers

I have a 4,3, and 1 year old and I feel safer in my Acura and Infiniti in that scenario.

Check into this... It describes your problem and I had the same issue once when I had 300 miles on the odometer but not again:

"That is exactly what the problem I had was like. It is gone. I posted fix and part numbers, and after getting service manager to listen, they swapped pump. Annoying once. Not cool when you die in middle of intersection turning across traffic.

Part number 221-270-01-97 Transmission oil auxiliary pump."

PeterUbers

It took me lighting up a sh-tstorm and heavily legally threatening Mbusa until they finally took me seriously and bought back my two e550's for the trans problems I had ... And those were just nuisance clunks ... This is more serious I think

I've been driving the car this evening after the trans update and it drives the same... No perceived differences

Will be interesting to see what the c63 w205 players say about their mct's

There is no talk about this lag on the w204 c63 or w218 cls63 forums

xxGenericSNxx

Just FYI W204 C63 has a different engine (M156) and I haven't noticed any of this lag on my M156 R63.

W218 CLS63 sells in less volume than the W212 E63 so just because we don't hear about it doesn't mean they also don't have the issue.

PeterUbers

This PL member claims all his mct issues are gone with pump replacement

"It's been healed!
No problems, goes like stink. Still love my wagon.
No stumble, no lag, no jerks, nothing."

That's difficult to believe as 2015 owners are saying this is all still there... I'm not saying his isn't fixed but it's just hard to believe

unagi1

Weird...going to have to try to repro this; I do tend to drive around more in manual, at any rate. And, I rarely stomp on the gas at an intersection, always roll into the throttle.

PeterUbers

In s or s+ Try a quick stop and go from like 20mph to 0, then as soon as you're about 5 mph jump on the gas again ... Flooring it... Does it stumble and jerk until it stabilizes and then pulls like stink?

It Probably does, and this guy says that's all gone with the pump ...

DATURK

MINE IS LITTLE MORE INTERESTING "ITS A RACE CAR IT'S QUITE NORMAL", WHAT EVER PROBLEM YOU ENCOUNTER, THE ANSWER IS ALWAYS SAME, "ITS A RACE CAR IT'S QUITE NORMAL", THEY MUST THINK WE ARE IDIOTS...

SilveRT8

I tried it in Manual today, coming to nearly a stop, gaz pedal to the floor, I count 1001-1002 and than she goes !

unagi1

Alright, so I tried this out -- coasting to a stop from various speeds and different modes (s,s+,m), either at a stop sign or coasting to a red light that turned green, etc...then going 100% throttle.

The good news, at least from a consistency standpoint:
The lag is definitely there, but none of the stalling or bucking reported. A good second and a half of no response, then car jumps into action.

The bad news (for those frustrated with the issue):
However, this is not how I drive the car which explains why I have never a) ran into this issue or b) perceive it as a problem during day-to-day driving.

Prior to 2011 when I picked up the E55, I'd never owned a car with an automatic/MCT/etc. Drove a manual trans mr2, 2 cobras, 335i, etc. A few had lightened flywheels, some had turbos at high boost whose power delivery would punish you if you stomped on the gas any where in the rev range. At any rate, I always rolled on the throttle just out of habit. Lots of track and SCCA Solo events have taught me the same way.

From a gas pedal point of view, I am still driving these cars like they have 3 pedals -- and I didn't even realize it until I saw this thread.

1)Green light turns red and I need to turn left? Step on gas slowly until wet clutch engages, wait for car to pass and then increase gas
2)Coasting to stop light that just turned green? Foot on gas past dead-pedal threshold, then hold until gas needed to keep going
3)Coasting stop at stop sign? If uphill, keep gas on pedal like you would when holding revs and letting clutch slip with left pedal. If downhill, just use cars' momentum to keep revs up and roll onto throttle from point of engagement.

This car in particular does not like sudden throttle inputs at low speed, and I have been able to get around it by constantly getting to the correct threshold on the gas pedal for it to keep the trans engaged and not stalled.