high pitch noise

[mrjtodonnell]

Hi,
99 slk 230,there is a high pitch whining noise inside the car,had it checked by the dealer and confirmed it is either a vacuum pipe or a electronic component inside the heater control.
A easy fix is to run the heater on low all the time,that did the trick for a while now the sound is getting worse,i now need to take the heater control system out to remedy the problem.
The problem is,how do i take the heater and dash assembly to bits.
Any advice.
Cheers

 

[stella best]

Are you sure its the heater as i had a simalar sounding prob on my ML and it turned out to be a cooling fan on an ecu behind the bulkhead that mercs said wasnt there so it couldnt possibly be that but as the info i get on here is always spot on i shouted abit louder till they listned then they fixed it F O C
Just an idea (what do i know :lol: )
Cheers
Stella Best (drink of the day)