Please check my VIN for Balance shaft issue?
Thanks so much for providing us this information. If you wouldn't mind, could you please look up my automobile. It is a 2007 CLK550
Vin is: WDBTJ72H67F207472
Thanks again, Matt
WDBTK75G54T020592
On V6 engines, a balance shaft is used to reduce engine vibrations inherent in that cylinder configuration. It's basically a shaft inside the engine block, parallel to the cranhaft with offsetting weights. It is drive by the center idler sprocket on the timing chain. The sprocket is just a forged part of the balance shaft. V8 engines are by design balanced and do not need a balance shaft. Their center idler sprocket for the timing gear is just bolted to the front of the engine block, inside the timing case.
The "balance shaft" failure is not actually a problem with the balance shaft itself, but is a failure of that center idler sprocket. On the V6, the repair requires replacing the balance shaft as it is all one forged part, but ont he V8, it;s gust the gear.
Unfortunately, your V8 is in the range for potential failure of this sprocket. Keep in mind that it may never be a problem as only a small percentage in the range have had problems. It seems the issue was improper heat hardening of the metal, but not all were affected. Maybe it was the "Thursday" parts, only the ones in oven #6 or those that "Bob" made. At any rate, plenty of cars never have the problem. Some people suggest that if you go over 100K miles with no problems, that you can breathe easy, but I have heard reports of a few that did show up then, but right over 100K. My advice is to get an OBDII scanner (any cheap one will work) and then check weekly for P0016 and P0017. They can be stored even if the MIL is not illuminated.
WDBTK75G54T020592
The Best of Mercedes & AMG
WDBUF87X78B344697
Thank you so much for your help
Thanks again for your help....!!!
from mercedes bulletin:
Applicable Models (Not Applicable to Model 164.156, 204 or 216.386): Equipped with M272 Engine Up to Serial No. 2729..30 468993 or M273 Engine Up to Serial No. 2739..30 088611.
The material for the balance shaft sprocket and the timing chain guide wheel (idler) was modified on engines past the serial numbers listed above.
Back to driving in snow with my ESP off lol... jk time to add some mods i wanted finally
Kindly help check these 2units of E280 2007 which I interested to purchase; are they in the range for potential timing chain idler sprocket failure?
WDD2110546L004424 Engine 27294330458075
WDD2110546L004446 Engine 27294330458097
Thanks so much for your wonderful services!
Regards,
Sean
FYI, these engine serial numbers are in the format of M27a9bb3cdddddd. "a" is "2' for the V6 model and "3" for the V8. "bb" is a sub-part number differentiating the different displacement size (These engines were built in ranges from 2.5l to 5.5l). "c" can really just be though of as the 7th digit of the serial number ("dddddd"). So, when I say "up to engine #468993, it means up to "M2729xx30468993" and up to 88611 is "M2739xx30088611".
FYI, these engine serial numbers are in the format of M27a9bb3cdddddd. "a" is "2' for the V6 model and "3" for the V8. "bb" is a sub-part number differentiating the different displacement size (These engines were built in ranges from 2.5l to 5.5l). "c" can really just be though of as the 7th digit of the serial number ("dddddd"). So, when I say "up to engine #468993, it means up to "M2729xx30468993" and up to 88611 is "M2739xx30088611".
I'm wondering if all E280 built 2007 are affected...meaning I'll have to look at year 2008 for unaffected E280 ?



