w210 E55 Acceleration Problems! Please Help Gents...

[DmitryNov]

Hey guys ive owned a W210 E55 AMG for few months now its been great to me from the start so ive replaced few parts on it from the start so to say regular maintenance..... Then few months later started having a lot of acceleration issues i literary thew all of these parts at the car:

Bosch Iridium Spark Plugs New OEM
Brand New All 4 Tires...........
Belt Tensioner Replaced OEM Mercedes
Belt Replaced OEM Mercedes
Idle Pulley Replaced OEM Mercedes
Back and Front Struts Replaced Bilstein OEM
Brand New Tie Rods OEM Mercedes
MAF sensor Replaced (Mass Air Flow Sensor) OEM
TPS sensor Replaced (Throttle Positioning Sensor) OEM
Transmission Flush Done all Filters replaced Electronic connector replaced
Torque Converter Drainer and Replaced with new fluid
Water Pump Replaced BOSCH OEM
Brand New Power Steering Rack OEM Replaced !
Air Conditioning Refilled.....
Air Filters Been Changed Kleeman OEM
Carbon Fiber Dash Wrapping Whole Central Console !
Brand New Motor & Transmission Mounts!
Brand New SwayBar Bushings OEM!
Brand New Rear Control Arm Kit OEM!
Brand New Set of 4 Subframe Mounts OEM!
Brand New Wheel Hub And Bearing (Front) 2 OEM!
Brand New Rear Bearings Replaced (Rear) 2 OEM!
Rear Differential Fluid Changed
Valve Gasket Covers Replaced OEM!
Spark Plug Wires Replaced OEM!
BG44K Used to Clean the Fuel System !
Fuel Pump Replaced OEM! Bosch
Fuel Filter Replaced MANN OEM!
Emergency Brake Replaced with New Parts!
Brand New Brake Pads Installed!
Shift Leveler Replaced with new Selenoid OEM!
Vacumm Hoses Replaced Brand NEW OEM!

and after all of this even tho half of these things have nothing to do with the problems im having just an overly obsessive maintenance since i like to take care of all my cars i cant figure out what to do the only 2 things i still havent tried yet was the O2 sensors and the catalytic converters.............. can somebody help me try to figure this out ive been on a lot of american mercedes forums and even the dealer and non of them can figure out whats wrong...... if anybody have any insight on this please help !

 

[E55BOF]

What problems are you actually having with the acceleration? If you give us some details, somebody might be able to help.

 

[DmitryNov]

This is whats going on every time i would replace a part of it like for example a fuel filter and a Fuel Pump it would run great for a week then turns into a grandpa so when i floor it it barely moves.... then i would replace a Maf Sensor same thing does great for a week then suddenly starts doing the same...... then it was iridium plugs and new spark plug wires then coils then vacuum tubes ect and still the problem persist im at a loss right now.........

 

[DmitryNov]

it feels like everytime i disconnect the battery in the car it runs like wow... then a week later feels slower then a honda civic dont get me wrong i love the car and all and dont want to sell it...... but for god sake how much money do i need to spend on it so it runs normally like it feels like it wants to go when i floor it but only goes when it reaches 4k RPMs..... from 1-4k when i floor it lightly it feels fine as soon as i put it to the floor feels like something is holding it back untill it reaches higher RPM range..... then it pulls away i dont usually speed on the car its a big V8 but sometimes i drive along somewhere and want to pass another vehicle and floor the car all i get is hesitation like it wants to go but then it changes its mind 20 million times wtf ?

 

[E55BOF]

No obvious common feature there. If I were you, I would take it (when it's not running properly, obviously) to a Mercedes dealer, or an independent Mercedes specialist, with a STAR diagnostic machine and get the fault codes read.

 

[DmitryNov]

but the thing is there are no fault codes of any kind at all !

 

[AMGeed]

^ Did you attempt to read the fault codes with STAR diagnosis equipment whilst the car was running poorly?
If not, what is your location so someone may be able to suggest a good Mercedes independant mechanic to trace the fault.

 

[renault12ts]

Diagnosis by cheque book? Never really successful is it?

 

[merc180]

Sounds like the turbo had it!!

 

[merc85]

Sounds like the turbo had it!!

really?? lol w210 e55 are n/a bud

 

[Howard]

Sounds like the turbo had it!!

You think ?

 

[GordonTarling]

As Olly of PCS has said so many times, Star faults are only part of the story. Live data will also tell you a lot and this needs someone with experience to analyse properly. Find an MB specialist who knows what he's doing.

 

[92Adam]

Sounds like the turbo had it!!

 

[dstevenkrash]

Hi There,

I have been having the same issues for over 2 years now and I would love to know what the outcome was for you. I am close to selling the car as I have spent lots of money and the car still runs like a slug.

My mercedes mechanic said he has never come across something like this before and he is just as confused/intrigued as I am *He has been an AMG tech for over 30 years*.

Thanks,
Steven - Adelaide Australia

 

[E55BOF]

Tell us what the symptoms are and we might be able to help.

 

[dstevenkrash]

Tell us what the symptoms are and we might be able to help.

Similar problems to what this thread describes. I’ve changed almost every part so far that’s listed and the car still performs poorly.

After a battery reset the car at any throttle level pulls hard and very sharp. After 500-1000km’s of driving the car becomes sluggish and the gearbox doesn’t know what it wants to do. If you give 95% throttle the car hesitates for up to 5 seconds then shifts down and pulls but with very little power. Other times it will downshift and pull very slowly until it gets to about 5000rpm then the car will surge as if there was turbo lag but it’s a NA v8.

I can’t attach a dash camera video of the car surging for evidence. I had the throttle down 95% (up to the kick down but not depressing it) and the car accelerates very slowly then out of nowhere all the power hits you and it bounces off the rev limiter.
I can provide the video through drop box or Facebook messenger.

The car symptoms I’m experiencing are almost identical to what’s described above.

Any help would be greatly appreciated.
Thanks,
Steven

 

[Wearsthefoxhat]

Had a similar thing on our Clk 320 (W208). Turned out to be a combination of the throttle position switch ( the switch, potentiometer by the accelerator pedal as the correct name eludes me at the moment) and a duffish battery.
As already said, better spend some money on a proper diagnosis and less on guess work.

 

[dstevenkrash]

I’ve also

Similar problems to what this thread describes. I’ve changed almost every part so far that’s listed and the car still performs poorly.

After a battery reset the car at any throttle level pulls hard and very sharp. After 500-1000km’s of driving the car becomes sluggish and the gearbox doesn’t know what it wants to do. If you give 95% throttle the car hesitates for up to 5 seconds then shifts down and pulls but with very little power. Other times it will downshift and pull very slowly until it gets to about 5000rpm then the car will surge as if there was turbo lag but it’s a NA v8.

I can’t attach a dash camera video of the car surging for evidence. I had the throttle down 95% (up to the kick down but not depressing it) and the car accelerates very slowly then out of nowhere all the power hits you and it bounces off the rev limiter.
I can provide the video through drop box or Facebook messenger.

The car symptoms I’m experiencing are almost identical to what’s described above.

Any help would be greatly appreciated.
Thanks,
Steven

I’ve also taken a video of my dash when giving 100% throttle from 40kmh up to 110kmh when the car is running poorly and then again right after a battery reset as a direct comparison.

Happy to send these videos as well as I’m sure it will amaze you and puzzle you at the same time.

 

[dstevenkrash]

Had a similar thing on our Clk 320 (W208). Turned out to be a combination of the throttle position switch ( the switch, potentiometer by the accelerator pedal as the correct name eludes me at the moment) and a duffish battery.
As already said, better spend some money on a proper diagnosis and less on guess work.

No fault codes, we’ve thrown almost everything at this car except a TPS at this stage. I’ll replace that within the next month. Interesting about the battery as well I’ve never considered it but it might be linked too.

I’ll keep everyone posted