Odd rise in revs before shifting?
Thread Starter
Super Member
Joined: Apr 2014
Posts: 728
Likes: 6
From: Chicago, IL
2018 AMG E63s
Odd rise in revs before shifting?
Hey folks - I've noticed some odd behavior, usually on cold start when first driving in C until temps rise. Just before each gear change (2nd to 3rd, 3rd to 4th, etc) the revs rise subtly but more quick, that is not consistent with speed. So instead of a smooth, consistent rise in revs they rise gradually and then slightly more quickly right before shifting, and then dropping down again. It's almost like the ECU or TCU or whatever applies this behavior until the car is warm? It's odd because I'm NOT used to revs rising totally out of sync with the car's speed.
Anyone else experience this? I think it goes away when warm and I certainly don't notice it once I've shifted into S, S+ or M.
Anyone else experience this? I think it goes away when warm and I certainly don't notice it once I've shifted into S, S+ or M.
Member
Joined: Apr 2014
Posts: 153
Likes: 2
2012 C63 Coupe
I get something similar during the first gear shift from 2-3, after a cold start and only in C. I think it's my transmission slipping between gears. I had the dealership look into it, but they said they couldn't replicate it, and there are no codes being thrown.
