so.. I have the buzzing relay issue under the centre console ,it only occurs when I throw the emergency flasher switch... I've swopped in a NEW relay, cleaned my switch (which works perfectly in my W201 190D) and tried 2 known working switches from other cars.. still have the buzzing... so, I measured the voltage reaching the relay, there is only 12v reaching it (it comes in via pin 49) when the switch is thrown, is this correct?
Any help appreciated!
Steve