weird noise coming from 89 560 SEL
This noise only occurs when I'm on the freeway. Here's what happens: After a few minutes driving on the freeway, I will hear this high pitched whistling sound for 5 to 10 seconds coming from the front of the car, probably somewhere in the engine compartment. This event will occur about every 5 to 7 minutes. If anyone can be of assistance I will be very grateful.
Thanks in advance.