2011 E550 transmission shift behavior
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From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
2011 E550 transmission shift behavior
My transmission stays in gears 2-3 for the first mile or so after the car has been off for a while. It stays around 2000 rpm for speeds below 25 MPH.
If I accelerate beyond this speed it will upshift. Once I have travelled the 1st mile, the shift patterns revert to normal. There is no difference between "E" or "S" programs.
I remember that in my C300 that there was a design point to hold the transmission in lower gears to warm up the catalytic convertor for emmisions control. Anyone else aware of this behavior. The transmission is smooth as silk the rest of the drive.
If I accelerate beyond this speed it will upshift. Once I have travelled the 1st mile, the shift patterns revert to normal. There is no difference between "E" or "S" programs.
I remember that in my C300 that there was a design point to hold the transmission in lower gears to warm up the catalytic convertor for emmisions control. Anyone else aware of this behavior. The transmission is smooth as silk the rest of the drive.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
This happens even when the temperature gauge shows 90 degrees C from the engine being shut down an hour before. I suspect that sensors on the converter are driving the behavior.
Last edited by HBerman; Aug 13, 2010 at 10:03 PM.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
I talked to my salesperson this AM who confirmed that this is normal behavior for the E550. It has something to do with the emissions control system.
