R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

R350 counter balance shaft sprocket defects

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 02-18-2022, 03:49 AM
  #1  
Newbie
Thread Starter
 
aniline's Avatar
 
Join Date: Jun 2021
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Mercedes r350
R350 counter balance shaft sprocket defects

Is anybody familiar with this manufacturing defect in all the 2004 to 2008 v6 engines, where Mercedes made these shafts of a weaker metal that gets warned out by the timing chain. This causes the check engine light to come on.
How many miles can u get out of it, after this happens, this is about a 6k fix by Mercedes
any ideas of a cheaper fix, the price of used engines on e bay are ridiculous and they still have the same issue.

Appreciate feedback
Old 02-19-2022, 01:39 PM
  #2  
Senior Member
 
Tsumi's Avatar
 
Join Date: Nov 2017
Location: San Francisco Bay Area
Posts: 485
Likes: 0
Received 95 Likes on 88 Posts
2006 R500
3.5 L M272 engines are about 1.5-2k on ebay, you would just have to find one pulled from an 08 or newer vehicle.

Alternatively, you can swap in a 5.5 L M273 engine as long as you get the complete harness with it. After that it's just a matter of coding the ECU with Xentry (find an indie mechanic familiar with Mercedes to do this) and swapping all the accessories and oil pan over. These run anywhere from 1.2-3k on ebay. Once again, make sure it is an 08 or newer or have the idler sprocket and cam plug replaced while the engine is out of the car.
Old 02-20-2022, 11:28 AM
  #3  
Newbie
Thread Starter
 
aniline's Avatar
 
Join Date: Jun 2021
Posts: 14
Likes: 0
Received 0 Likes on 0 Posts
Mercedes r350
Is this the same engine as the w251, which the r350 has?

Originally Posted by Tsumi
3.5 L M272 engines are about 1.5-2k on ebay, you would just have to find one pulled from an 08 or newer vehicle.

Alternatively, you can swap in a 5.5 L M273 engine as long as you get the complete harness with it. After that it's just a matter of coding the ECU with Xentry (find an indie mechanic familiar with Mercedes to do this) and swapping all the accessories and oil pan over. These run anywhere from 1.2-3k on ebay. Once again, make sure it is an 08 or newer or have the idler sprocket and cam plug replaced while the engine is out of the car.
Old 02-20-2022, 01:23 PM
  #4  
Senior Member
 
Tsumi's Avatar
 
Join Date: Nov 2017
Location: San Francisco Bay Area
Posts: 485
Likes: 0
Received 95 Likes on 88 Posts
2006 R500
Originally Posted by aniline
Is this the same engine as the w251, which the r350 has?
W251 is not an engine code; it's a chassis code. W251 used engines M113, M156, M272, M273, OM642, and M276 over its production run. 2006-2011 gas R350s used the 3.5 L version of the M272 engine.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: R350 counter balance shaft sprocket defects



All times are GMT -4. The time now is 09:23 PM.