EC light - AC Compressor
Here's how to get the diagnostics - www.fitzhughmedia.com/MBF/acdiag.html
ignition on, make sure AC system is turned on (EC light will be lit)
Switch off ignition, for say 10 seconds
Switch ignition back on, AC system comes on and this time press the EC button. Light should go out, start you engine and your AC should operate, assuming it is ok as you say.






