Sorry to be such a newbie, but I have a check engine light on that is caused by a P0128 code. After reading a lot, I've decided that my best course of action is to replace the thermostat.

So I did some research on various parts sites, and have found some conflicting information, so before I drop $115-$150 on a part that might be wrong, I'd like to know if someone could be so kind as to verify whether these are, in fact, both viable replacements for my exact car model, which is a 2009 C300 4matic Sport. Also, if both parts are compatible, is it a big risk (quality-wise) to go with the Wahler instead of the MB part?

4834100d (Wahler), or
2722000115 (Mercedes)

Appreciate any help!

W. Lehman

 

Did you ever get the answer for this?

 

bump?

 

I never got an answer, but I did go ahead to buy the Wahler, and had it installed, and voila, no more issue. Thanks!

 

I order it from ECS tuning and the part number was ES#2549125 which is the equivalent of Mfg Part#2722000415….Easy installation and work like a charm since last october….