I have an '87 300SDL with 101K on it. Just got it 3 weeks ago. There is a ticking noise in the blower that sounds like something loose inside the fan inlet. It's louder when cornering left than when I corner right, and is also affected somewhat when I brake. I remember reading a post somewhere that says that there is something that that typically falls into the blower inlet. I also remember that it could be accessed by removing the glovebox body. Any help?
The car is in otherwise great shape, and will be my daily driver, for about 75 miles a day.

The blower motor probably does have some foreign debris that is falling against the fan blades when you are cornering or stopping. To repair the problem simply remove the right side lower dash panel and you will see the blower motor assembly. Unplug the wires connected to the blower motor and remove the retaining screws. You should see some debris inside the blower motor housing. Remove the debris and reinstall blower motor. If you do not find any debris, it is possible that the blower motor itself is faulty.
I hope this helps!
Benzmac

Wow, I did what you said. Maybe having automatic termperature control makes it different. First, the cover panel doesn't come off very easily; there's losts of stuff in there. Second the heater inlet is connected to a duct (insulated on the outside) that is under a bunch if wire and cables. All of this scared me off. I'm going to get my shop to look at it, since I can't get the AC compressor to kick on, anyway.

Tom

The right side of the car is as you would be sitting in the car. I.E. passenger side. I will clarify this from now on.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

The guy at my shop(so far a great shop) took the panel off today. He says that you have to take off the sill plate and the kickpanel before you take down the lower dash cover. The heater system apparently uses this area as a plenum, and it's under negative pressure when the fan is running. I say this because a large number of business cards and part of a cassete tape were what was in the fan. My guy says that the back of the glove box has a hole missing a plastic cover. The negative pressure sucked the stuff out of the govebox.

The AC compressor won't kick on becasue the system is low on refreigerant. He's filling it and checking for leaks tommorrow.