There is a unique sound that only a Mercedes-Benz M137 6.3L V12 makes at full throttle. But when that sound is replaced by the dreaded silence of a no-start condition, the owner’s heart sinks. If you own a 2001 S600 (W220) or CL600 (C215), you have likely typed three terrifying letters into Google: .

While the full thread runs dozens of pages, is the holy grail. Here is a summary of what the original poster (and subsequent admins) laid out:

We have tracked over 50 repair cases on the forum. Here are the top three hardware failures:

Ecm 2001 6.3: - Mhh Auto - Page 1

There is a unique sound that only a Mercedes-Benz M137 6.3L V12 makes at full throttle. But when that sound is replaced by the dreaded silence of a no-start condition, the owner’s heart sinks. If you own a 2001 S600 (W220) or CL600 (C215), you have likely typed three terrifying letters into Google: .

While the full thread runs dozens of pages, is the holy grail. Here is a summary of what the original poster (and subsequent admins) laid out: ECM 2001 6.3 - MHH AUTO - Page 1

We have tracked over 50 repair cases on the forum. Here are the top three hardware failures: There is a unique sound that only a Mercedes-Benz M137 6