When I turn the heater on above 58 degrees it sounds like whale talk, know why? on 1999 Mercedes-Benz C280

Hi, I'm driving my first Mercedes ever and I'm trying to understand how to fix an annoying thing I noticed happens when i turn the heater on. When I turn the heater on above 58 degrees it sounds like whale talk, any idea why? This annoyance, and embarrasing, issue continues endlessly unless I turn it to "Low" or turn the "Window Defrost" instead.

by in San Ramon, CA on December 24, 2011
0 answers