I do not know anything about Mercedes
Could someone explain to me how the electric fan in front of A/C condenser is wired and where the connectors, switches and relay are? I would like to jump the fan motor to see if the motor is dead or the relay or a switch are bad... The fan does not kick in even with A/C on and temp gauge all the way to the last white mark...

Is there a way to bypass the A/C high switch (if it operating the fan) and have it hooked up so it kicks in when the engine is warm regardless of A/C on or off? If the motor is bad, is there way to wire in a cheap fan from Pep Boys? I can use all help I can get so please feel free to comment or advise... Peter

Helpful hint for newbees - Use the SEARCH !

Welcome, Peter! Many of us (me included) have learned much of what we now know about MBs from sites like this.

What Arthur is subtly trying to tell you (not that he needs me to translate!) is to start off by searching the site. There are MANY, MANY posts on this subject, which is to say that many of us have had problems with our auxilliary fans. Fortunately, it's a simple system to diagnose and fix.

Search on "aux fans" and you'll learn a lot. Wouldn't be surprised to see some very cogent posts by Mr. Dalton (and a few by me).

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Steve
'93 400E

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I had to look that one up..

" analysis of a problem presented in a way that brings out pertinent and fundamental points"

That's what all those [ xyz] bracket tags I use so often are for ...
Tnx

LOL, thank you very much... I actually did a search before posting (maybe there should be check mark field-search conducted before posting...) Maybe I was not thinking straight since I am still high on gasoline fumes from a little stint under the car yesterday replacing a holy fuel feedline... LOL... Nevertheless, I already fixed my problem by replacing the fuse (it did not look blown but it was...)... I am not that dumb when it comes to working on cars but this Mercedes gets me for 2 reasons: I bought it for my ex and the only time I get around it is to work on it or service it... and the other reason is that the car is overbuilt way worse than my 90 944 cabrio... LOL, everything is a major chore trying to take anything apart... Anyway, all is well and I do not have to deal with it (for now...)... Thanks again...

Peter,
Glad it was a simple fix! If the fuse blows again, I THINK this is one of the very rare occasions that this is true that MB actually allows you to increase the amperage of the fuse. The fan motors may increase their current draw with age/use. That happened to me; the fuse would blow every few months and I went from a 15-amp fuse to a 20 with no further problems. If I'm not mistaken, Arthur has posted on this very issue in recent months.

You are generous indeed to buy a very nice car for your ex. You are right about them being overbuilt. In my very limited experience, most systems are just enough different from what I'm used to in American cars that they are not particularly intuitive, but there IS a rationale for every engineering decision made. You and I might not agree with that decision, however ...

Arthur,
you are a real font of wisdom. I ALWAYS learn something new when I read one of your posts!

Steve

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Steve
'93 400E