no boost/ half power
Thread Starter
Newbie
Joined: Jan 2026
Posts: 2
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2019 E63s Wagon
no boost/ half power
Recently purchased a 2019 E63s Wagon.
been having this issue since I got it.
After driving 50+ miles, the car seems to go into limp mode.
When accelerating, the boost gauge may reach a quarter, and power is capped at about 320.
What's weird is that after shutting the car off for about 5-10 minutes, everything works fine for about 10-15 minutes, then it happens again.
No CEL, and the only other thing is the battery might need to be replaced.
Does anyone have/had similar issues or have an idea what's causing it?
been having this issue since I got it.
After driving 50+ miles, the car seems to go into limp mode.
When accelerating, the boost gauge may reach a quarter, and power is capped at about 320.
What's weird is that after shutting the car off for about 5-10 minutes, everything works fine for about 10-15 minutes, then it happens again.
No CEL, and the only other thing is the battery might need to be replaced.
Does anyone have/had similar issues or have an idea what's causing it?
Thread Starter
Newbie
Joined: Jan 2026
Posts: 2
Likes: 0
2019 E63s Wagon
MBWorld Fanatic!
Joined: Mar 2006
Posts: 4,278
Likes: 377
From: San Jose area
'19 E63S sedan
If the flaps fail to open, backpressure limits boost. The fix depends on the cause and can be anything from lubing them to replacing the actuators. Some people remove them, but that requires coding.
MBWorld Fanatic!
Joined: Mar 2006
Posts: 4,278
Likes: 377
From: San Jose area
'19 E63S sedan
There are a lot of threads here on the issue. Here's one:
https://mbworld.org/forums/w213-amg/...ost-power.html
https://mbworld.org/forums/w213-amg/...ost-power.html
