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My 2016 Mercedes E350 4matic hesitates upon acceleration and when in 5th gear. What could be the cause? Can anyone help or have had or have this issue.
My 2016 Mercedes E350 4matic hesitates upon acceleration and when in 5th gear. What could be the cause? Can anyone help or have had or have this issue.
Hesitation during acceleration from lean mixtures or tranny...
Many things can impact driveability: faulty pumps, misfires, low voltage... a specific TSB may be available for hesitations.
Get your car scanned for obvious faults codes before anything.
Tell us about current mileage and service history....
Hesitation during acceleration from lean mixtures or tranny...
Many things can impact driveability: faulty pumps, misfires, low voltage... a specific TSB may be available for hesitations.
Get your car scanned for obvious faults codes before anything.
Tell us about current mileage and service history....
It currently has about 70000 miles, currently been scanned no faults. No major services
It currently has about 70000 miles, currently been scanned no faults. No major services
...unfortunately nothing obvious.
You're left with troubleshooting from data or the wet finger parts canon
#1: unregulated fuel pressure ?
#2: negative fuel trims ?
#3: ignition misfire ?
Last edited by CaliBenzDriver; 09-12-2022 at 03:53 PM.
It currently has about 70000 miles, currently been scanned no faults. No major services
Scanned by? Autozone/PepBoys/AdvanceAuto, or MB-aware scanner? Sometimes there are no "visible faults" unless you get down to the modules and check for stored codes.
Hesitate under mild acceleration, or hard acceleration (like racing off the light)?
If it only happens about the 5th gear, and not other gears, @CaliBenzDriver what do you think about disconnecting both batteries? Count to ... 1 min? Then, reconnect.
Scanned by? Autozone/PepBoys/AdvanceAuto, or MB-aware scanner? Sometimes there are no "visible faults" unless you get down to the modules and check for stored codes.
Hesitate under mild acceleration, or hard acceleration (like racing off the light)?
If it only happens about the 5th gear, and not other gears, @CaliBenzDriver what do you think about disconnecting both batteries? Count to ... 1 min? Then, reconnect.
only under mild acceleration, takes off fine under hard acceleration.
I will try disconnecting both batteries
By no means am i expert, i just do know the 4matic kind of learns driving style or some such in eco but think it doesnt use that in sport. Anyhow good luck
The car Reboot step is an excellent start for any odd symptoms. Once done you can assume SAM's are back on their best behavior.
Without access to live data... the next step is your local MB specialist who has tools to restore lost performance.
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Last edited by CaliBenzDriver; 09-13-2022 at 08:57 PM.
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The part that throw me a for loop is only happening in 5th gear. That eliminates a lot of possibilities like fuel pump or engine mounts and points to the gearbox itself. Maybe the gears or the torque converter is starting to fail?
The part that throw me a for loop is only happening in 5th gear. That eliminates a lot of possibilities like fuel pump or engine mounts and points to the gearbox itself. Maybe the gears or the torque converter is starting to fail?
thank you guys, I looked up signs off a bad torque converter and it lines up with what’s happening. I plan to take it to my mechanic to checkout. I will keep you updated.
09-12-2022, 12:06 PM
