2011 e350 with 0521 code
Yesterday, 05:48 PM
#2
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 5,441
Received 3,370 Likes
on
2,242 Posts
MY'14 W212 M276 3.5NA @55kMi
nope... it's actuated by a failed vacuum valve off the pump. It also pumps oil into these actuator diaphragms.... that oil needs to be emptied out to allow motion.
Last edited by CaliBenzDriver; Yesterday at 05:50 PM.
Yesterday, 05:55 PM
#3
Junior Member
Thread Starter
Last edited by Apexlate; Yesterday at 06:01 PM.
Yesterday, 06:20 PM
#4
MBWorld Fanatic!
Join Date: Apr 2019
Location: Silicon Valley
Posts: 5,441
Received 3,370 Likes
on
2,242 Posts
MY'14 W212 M276 3.5NA @55kMi
located at bank2 rear (driver side)
Your engine may have a different setup.
Compatible scanner will let you actuate these flaps for testing.
Last edited by CaliBenzDriver; Yesterday at 06:23 PM.
Yesterday, 06:33 PM
#5
Junior Member
Thread Starter
Today, 12:21 PM
#6
MBWorld Fanatic!
Join Date: May 2018
Location: Jakarta-Indonesia
Posts: 4,331
Received 4,394 Likes
on
2,576 Posts
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Here is some guide to troubleshoot it electrically.
You can use hand vacuum pump to replace engine vacuum pump suction too, for the troubleshooting if engine is off.
It can also have breakage inside the manifold.
M272 will have this issue eventually. Plastic will break.
If the vacuum source ( pump ) is the problem from its little orange diagram failure as Cali pointed out, remove it and inspect and/or suck it with hand vacuum pump when you do not want to remove to inspect.
You can test your vacuum pump check-valves engine off and its current performance with engine ON :
https://mbworld.org/forums/e-class-w...rity-test.html
You can use hand vacuum pump to replace engine vacuum pump suction too, for the troubleshooting if engine is off.
It can also have breakage inside the manifold.
M272 will have this issue eventually. Plastic will break.
If the vacuum source ( pump ) is the problem from its little orange diagram failure as Cali pointed out, remove it and inspect and/or suck it with hand vacuum pump when you do not want to remove to inspect.
You can test your vacuum pump check-valves engine off and its current performance with engine ON :
https://mbworld.org/forums/e-class-w...rity-test.html
The following users liked this post:
Apexlate (Today)
