Originally Posted by WaarrEagle (Post 4188632)

I know this is an old thread, but I have the same car as OP (2009 E320 Bluetec) and I am seeing a different part number in EPC for this sensor. I see A0009053805. Sharing in case others stumble across this via internet search like I did.

Originally Posted by ROLLGUY (Post 4201246)

This sensor has either gone bad again, or needs to be cleaned. It is just as easy to replace it as it is to remove and clean, so a new one is on order. I found one in the US on the "Rock" that sells Auto parts. All the others I could find are in foreign countries, and are more expensive.....Rich

Originally Posted by WaarrEagle (Post 4207081)

Any tips for replacement? Is it hard to access? My 2009 is throwing the code for it pretty frequently so I am ordering a replacement.

Originally Posted by ROLLGUY (Post 4207082)

It is quite hard to access, but doable. I have done it twice, but found out it is not worth removing just to clean it. Cleaning it does work, but may only last a few months. After replacing it the first time, it lasted a couple years. If I remember correctly, there is not much room to move a wrench, so it needs to be flipped back and forth to get a bite on the flats of the sensor, moving it only a few degrees at a time.

Originally Posted by WaarrEagle (Post 4208243)

WIS instructions, attached, say to remove the exhaust pipe from the turbo. Is that necessary? My sensor is in the mail so trying to prepare!

Originally Posted by jay_bob (Post 4208361)

You will just need the big triangular gasket if you take the elbow piece off.
And the 3 single use bolts that hold it to the exhaust side of the turbo.
The bottom end of the pipe just has a band clamp, no gasket.

On the back of the turbo, the top 2 bolts have to come all the way out, the bottom bolt only has to be loosened as the elbow has a slot at the bottom.
But you do have to replace the 3 bolts as they are stretch to yield.

From my turbo thread (http://www.peachparts.com/shopforum/diesel-discussion/403465-om642-vnt-turbo-actuator-issues.html), I bold faced the parts that need to be replaced for the exhaust elbow.


Qty Needed - MB Part number - EPC Description - (plain english description) - EPC Group/subgroup/callout number (for OM642 in W211.022 chassis)

1 - A642 142 07 81 - Metal Seal Stay to Cylinder Head - (goes between turbo and pedestal) - 09/075/60
2 - A001 990 03 14 - Bolt Turbo on Support M8 x 27 - (these hold the turbo to the pedestal) - 09/075/50
1 - A219 492 00 80 - Flange Gasket to Turbo - (turbo exhaust discharge gasket) - 49/222/70
3 - A000 990 67 03 - Bolt M8 x 20 - (holds turbo exhaust discharge elbow to turbo) - 49/222/80
2 - A642 142 18 80 - Gasket - (used on both ends of EGR 90 deg. tube) - 14/090/45 and 14/090/55
2 - A000 990 69 03 - Bolt M6 x 16 - (used on exhaust collector end of EGR tube) - 14/090/50
2 - N000000 001119 - Bolt M6 x 33 - (used on EGR housing end of EGR tube) - 14/090/55
1 - A642 142 32 80 - Gasket - (exhaust collector to right exhaust manifold) - 14/060/20
1 - A642 142 31 80 - Gasket - (exhaust collector to left exhaust manifold) - 14/060/20
6 - A000 990 68 03 - Bolt M8 x 25 - (exhaust collector to manifolds 3 per side) - 14/060/33

Following are the intake side gaskets if you need to replace them

1 - A642 094 00 80 - Seal Turbo Intake - (big red molded ring from the Y-pipe to inlet) - 09/050/10
1 - A014 997 64 45 - O-Ring - (green o-ring, from turbo outlet to silver outlet pipe) - 09/050/50

Originally Posted by WaarrEagle (Post 4208491)

Thanks Jay - always so helpful! Hopefully I can get it off without removing the elbow but looks doubtful from some YouTube videos I saw on an ML.