Mercedes Benz

A/T, CVT Transmission - Howling Noise SI M 24 02 06 Automatic Transmission January 2007 Technical Service This Service Information bulletin supersedes S.I. M24 02 06 dated May 2006. [NEW] designates changes to this revision SUBJECT CVT - Howling Noise from the Transmission MODEL R50 W10 with CVT up to 05/2005 SITUATION The customer may complain about a howling type of noise coming from the CVT transmission, when the gear selector is placed in D, M, or S position and the vehicle speed exceeds 5 mph. The noise description may vary from "rattling" to "howling", depending on the degree of main bearing wear. The frequency of the noise increases with the engine speed. This noise is not present with the gear selector in N or P position and the vehicle at a standstill, with engine running at idle. CAUSE Excessive wear of the main ball bearing in the CVT transmission. 2002-2006 Mini Cooper (R50) L4-1.6L (W10) Page 264 CORRECTION On a customer complaint basis only, replace...