OM642 EGR / throttle body vacuum connector?
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 20
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From: California
2011 E350 Bluetec
OM642 EGR / throttle body vacuum connector?
Servo with vacuum inlet on the bottom.
Dear diesel experts,
I am finishing up the oil cooler leak repair (2 days and counting) All looks good on my 2011 E350, except I cannot figure out what kind of vacuum hose was originally connected to the servo attached beneath the EGR pipe. The servo is operating a small 1" round flap, and there is a vacuum port. However, I can't see any small stray tubes around this place, and frankly I don't remember taking any off during the disassembly. Is it optional (the flap is normally open)?
Thanks!
Last edited by yuril; Nov 3, 2019 at 06:39 PM. Reason: Add pictures
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 20
Likes: 0
From: California
2011 E350 Bluetec
Found it, but a new riddle...
Apparently, the part is MB A 642 140 14 63 (changeover flap).
Still, there is no trace of the part (switch over valve) that it is supposed to be connected to it via a vacuum hose. Wonder if this valve is optional on my OM642 version -- there are no hoses connected to the vacuum pump, besides the brake assist line (A 212 430 18 29). Did anyone see this valve actually installed near the throttle body assembly?
Still, there is no trace of the part (switch over valve) that it is supposed to be connected to it via a vacuum hose. Wonder if this valve is optional on my OM642 version -- there are no hoses connected to the vacuum pump, besides the brake assist line (A 212 430 18 29). Did anyone see this valve actually installed near the throttle body assembly?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
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From: V E G A S
1922 Ford Model T / no OBD
This engine has NO THROTTLE 
I have bunch of pictures I took on my 2008 engine when I work on it, but can't locate such part.
But between year of my engine to the year of your engine MB switched to DEF, so that could create lot of changes.
I have bunch of pictures I took on my 2008 engine when I work on it, but can't locate such part.
But between year of my engine to the year of your engine MB switched to DEF, so that could create lot of changes.
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 20
Likes: 0
From: California
2011 E350 Bluetec
MB A 642 090 02 70 is INTAKE AIR THROTTLE:
http://mbepc.net/3/m/om642/69h/642850/0/14/030
Junior Member
Joined: Jul 2017
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C63 AMG 2009
hi, if its not done yet ... your vaccum hose from brake booster hose si attach to an switch over valve A0025407097, and vaccum hose from that part to the nipple in your picture...
mine doesnt have any electrical connecteur on this switch over valve ? do you have any one on it ?
mine doesnt have any electrical connecteur on this switch over valve ? do you have any one on it ?
Junior Member
Joined: Jun 2019
Posts: 45
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From: GTA
W212 Bluetec
hi, if its not done yet ... your vaccum hose from brake booster hose si attach to an switch over valve A0025407097, and vaccum hose from that part to the nipple in your picture...
mine doesnt have any electrical connecteur on this switch over valve ? do you have any one on it ?
mine doesnt have any electrical connecteur on this switch over valve ? do you have any one on it ?
