Body and Interior Specific Aid

1979 300TD No Heat!

My heat has stopped working just in time for the cold weather! The temperature control unit works fine except for the complete lack of heat (the buttons all seem to do what they're supposed to). The heat gauge on the dash shows that the engine is getting hot, but none of the temp. control settings (defrost, bi-level, etc.) make hot air blow. The air coming out of the system is the outside temp.-frigid! I recently rebuilt the vacuum pump after the diaphram tore and a little oil got in the lines. But this sounds like an electrical problem, no?

I recently got the Mercedes factory HVAC manual, but I don't know where to start with this problem. I have the vacuum and wiring diagrams and now have a rough idea of how the system works (it's complicated!).

Chassis Model Number

W123

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Body and Interior Specific Aid

82 300d gradual electrical failure

My gifted 82 300d seems to have cancer of the electrical systems. First windows, then blowers and heat/cool, now locks. Where do I start looking (Seems to originate in the panel between the seats)? Is this too much for a mech head girl with no time and no garage in a cold place? Car came from my brothers estate, know he replaced a lot of engine parts, hate to dump it, but need to be realistic.

Chassis Model Number

W123

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Body and Interior Specific Aid

Aftermarket radio wiring

I have a 1980 300SD in which was installed an aftermarket (Blaupunkt) radio. The left front speaker is the only one which currently works. I have checked continuity on the other speakers: there appears to be none. I also receive only a couple of stations, suggesting the antenna connection to be poor. I suspect that all of these connections were violated when the previous owner had the car repainted. Where do the wires for the other three speakers run? what would be the easiest way to access the speaker and re-establish wiring to the radio chassis?
Thanks,
-Steve-

Chassis Model Number

W116

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Body and Interior Specific Aid

1985 300SD Burglar Alarm problem

How do I disconnect, turn off, or otherwise disable the burglar alarm in my 1985 300SD ? I had to go through deep water (8"+) at slow speed. Shortly thereafter, when I turn on the lights at all, the burglar alarm goes off and lights flash. This is embarrassing, at the least, to drive at night, so presently I have just parked it in the garage until I can solve it. I tried the driver door key lock/unlock - no difference. After setting over a week in my garage to dry out completely - no difference. I live in rural N.W. Indiana and there is really no need for the burglar alarm.

Chassis Model Number

W126

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Body and Interior Specific Aid

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