Mercedes repair question

[Rons921]

1993 400sel. Heaters blower stays on even after car is off and fuse removed. What do I do?

 

[jamesmcuk]

check blower relay its probably stuck

 

[kornphlake]

if the blower stays on when the fuse is removed you've either pulled the wrong fuse or you have a short. The circuit is some how closed behind the fuse. There may be more than one fuse, one for the relay and another for the motor perhaps.

 

[Rons921]

Thanks folks. Another dumb question. Where can I find the blower relay?

 

[kornphlake]

Thanks folks. Another dumb question. Where can I find the blower relay?

Honestly I have no idea, in a GM I could tell you, but I'm not at all acquainted with MB. I've heard that parts counters at the MB dealerships are very helpful. It might be worthwhile to make a call.

 

[jamesmcuk]

Well usually on many cars the a lot f the relays are in the same box as the fuses. I would get the blower running and then go pulling relays (one at a time) in that box and anywhere else I could find them until it turns off. If you do find a relay that makes a positive click as you pull it out and the blowers goes off then you know the relay is likely good. If however you can't feel / hear anything as you pull it it then its probably bad. Once you think you have isolated the relay responsible I would leave it out and try other systems on the car to make sure you have not removed a relay for another system.

To be fair though I think the advice above of asking the parts desk at Merc is a best first step as sometimes they can get damaged pulling them. They become really stuck in there over time.

 

[5150MyU]

Fuse 18,20,and/or 21 under the hood should stop the blower motor from running(the blower motor at the right side of firewall).
If it's the blower motor under the armrest then it is fuse #1 in the trunk.
Don't leave the fuse out as it controls other things.
I don't believe there is a relay for either of these fans as it is managed thru the controller(those buttons on your dash panel).
Not a MB tech-I just looked it up!!

 

[RU482]

there are a couple very good forums for Mercedes owners, with a lot of repair and maintenance resources do a google search for mercedes forum

 

[Ancalagon44]

Yeah, benzworld.org is a great forum for that kinda stuff.