Rear View Mirro

I have a 1997 E320 and the rear view mirror has a buzzing noise in it.  Does anyone know what the problem can be?  Should I prepare to have the rear view mirror replaced?

sounds to me like some sort of electrical short. if you can see the alarm warning lights at night clearly do they both work as they sould? e.g red one flashing periodically when the car is locked and then the green one when it is just opened etc. if not the unit itself is faulty. heres the catch, that mirror of yours would have the brians of the alarm in it so it is unique to your pacicular car if you know what mean. believe me they are rediculusly expensive to replace. (£400+) min. i would suggest that you leave well enough alone and put up with the noise but if it is very anoying reply to this and i can give you advise on how to open the 'sealed for life' unit and perhaps rectify the problem.

best regards, joe

87 w124 200, 95 c180, 96 E320 owner

Obviously the first thing I would do is touch the mirror to see if it is just vibration causing the buzz.  I think Joe has some good advice, however, it could also be the light sensing unit in the mirror as well.  I have a '98 E320 and it automatically adjusts for light sensitivity.  I had no idea the alarm brain was located in the mirror.

 

 

 

'98 E320...'89 300CE owner

i have a 1996 e320 and for a long time now the red light flashed when i locked and the green light flashed as i opened......but latley both lights have been flashing simultaneously when i lock or unlock......could this be an error message of some sort?....Any suggestions would be apreciated....the car has been a mystery to me when i bought it