wahoobo

So this has been happening for about a month now, at the start it only happened once in a week but now it's once a day, the car works normally and everything functions as it should in the start but after 2-3 hours of driving the turbos produce no boost and I have to turn the car off and then on for them to work.

Anyone know what's happening here ?

obbob

What's the temperature of your engine when it doesn't work? Only thing I can think of is that the turbos are too hot.

PeterUbers

What's happening is that this car isn't being diagnosed by the dealer --- do not accept it back until it's fixed

I know it's frustrating .. Sorry for your troubles

wahoobo

Temp normal, Also I live in Oman where the Average daily temperature is 40-50 degrees Celsius.

wahoobo

Taking it to the dealer soon and I'll post about what they tell me here.

RDOCA

It has to be software as it happened to me 3 times at about 1000 miles and never again and I now have about 5400 on the car.
It was always fixed with a restart and the temp was ok. Just stop and turn it off and on right away and it was good.
I would put HP and TQ screen up on the nav. screen and it would have about 275 HP with no boost but with a restart it would have 500HP and feel normal.
I had the dealer check it and look for codes but they never found anything.

wahoobo

Has It happened to you again ? Because it's getting quite frustrating with me

RDOCA

As I stated -it has never happened again after the 3 times at around 1000.
I could have missed it before as I drove it conservatively during break-in.
How many miles do you have on your car now?

wahoobo

Around 7705 miles

vaelin

Wastegate intermittent failure?

Turbo 'limp mode' due to ambient heat?

RDOCA

I never got a message ever and dealer could not find anything.

PeterUbers

A good dealer will hook up the computer to it and have the service manager drive it for a week to replicate

shardul

iTrader: (1)

all you need to do is connect the car to a DAS machine and there will be a code stored in the engine control unit.

Shadwell

Fixed it...

AMG MB

it happened to me 2 time last month around the 2000 mile..
after working the car very hard in sport+ mode and race mode..
i had to turn the ignition off and on to fix it.. i did not take it to the dealer.. i don't know if it will happen again.

CT-AMG

Add me to this list. I has happened to me 2 or 3 times. I did not bring it to dealer and like all of you, a simple stop and restart gets the boost back.

If anyone knows the fix please post it..

msheredy

VERY reminiscent of the intercooler water pump failures on the kompressor 6s and 8s. Water temps within the intercooler system get to high, via failed water pump, and boost is shut down till the water temp lowers. No codes tripped either.

StrikeTeam

I notice when I have the AMG screen up in between the tach and speedo, I don't see the turbo's boosting. Even when reving the engine. My C63s is new so I am breaking it in, so I have not been riding it hard, been waiting to hit 1000k. Not sure if its a problem that the turbos are not working.

How do you get tq and hp up on the nav screen? At what point do you guys see the turbos boosting?

Thanks!!

Strike

RDOCA

To put on the Nav. screen, go to the Vehicle button then Dynamic select then Engine data.
On the turbo boost screen in front of steering wheel it will not show any boost if you are not driving so stopped in park it will not register. You have to be driving.
You can watch the nav. screen and if you have boost it will go to 500 HP and 500 TQ but if no boost it will not go beyond about 275HP.
Mine did it early on but not since and I usually drive with boost screen up so I can see if I have a problem again, but not any more.

Dasani

Remember that you will not see boost when free revving, there is no load.

Boost only occurs when there is a load on the engine, like trying to accelerate.

When under a load, the engine can't swallow all of the air produced by the turbos at that moment. Air pressure is accumulated in the intake tract while waiting for the intake valves to open, which is what is measured as boost.

StrikeTeam

So when viewing the Nav screen, does the gauge only go up to 275 when the turbos are not working? Or does it read up to 500 and when accelerating the highest it gets up to is 275?

Thanks!!

RDOCA

The gauge never changes it just wont go past about 275 when boost is not working and up over 500 when normal on both HP and TQ.

RDOCA

Just happened to me today again--first time since 1000 miles and now 5500mi.
Stop and restart and all is well.
I just e-mailed my dealer service tech and asked if he would check with AMG.
All of you that has it happen should report to your dealer and tell them several guys on MB world and having same thing happen and maybe with more complaining they will look at mere seriously.

Jojipoji

for all of those whose turbos are not working, how many of you are/arent stock. ie piggy back etc...

RDOCA

stock