E9 A/C on-off, three position fan switch

[RedRV8tor]

Looking for an A/C on-off, three speed fan switch.
Thanks, RedRV8tor

 

[Dlc]

You can look into this post

This assumes you use the internal resistor in the original evaporator box.

Other options are discussed here.

If you have a different blower motor in your AC evaporator box (eg one with built-in resistor on the motor and with separate wires for each speed), you would need a different switch.

 

[RedRV8tor]

Thanks, here's a photo of the one I'm looking for and the resistor is incorporated to the back of the switch.

 

[Ohmess]

What year is your car?

 

[Dlc]

see suggestions on replacement here:
https://e9coupe.com/forum/threads/fan-blower-switch.43867/post-385739

Indak 2 Speed Rotary Blower Switch 71R1167

The Indak rotary blower switch has been in use for many years and is common to many OEM and aftermarket systems. Part Number: 71R1167 Current Rating: 15 A Positions: Off- Low- High Terminals: L H B C Connector: .250 Male Spade Shaft: D shaped Shaft Length: 11/16" Mating Connector: MT1345...

www.vmacs.net

Alternative w/ built-in resistor:
Ebay Link
Amazon Link

there is also an option to buy a new switch for Mercedes that should fit into our plug, but it comes in a different price range than the aftermarket product:

New Heater Fan defrost Switch fits Early Style Mercedes W110 W111 W112 W113 | eBay

New Heater Fan defrost Switch fits Early Style fits 200 220 230 250 S SL SE W110 W111 W112 W113.

www.ebay.com

 

[eriknetherlands]

Some background here as well:
Post in thread 'Replacing AC compressor and fan relay' https://e9coupe.com/forum/threads/replacing-ac-compressor-and-fan-relay.38161/post-329028

 

[RedRV8tor]

What year is your car?

1973. I was incorrect about three positions. Mine is “on” for compressor and variable fan speed with resistor mounted on back of switch to control fan speed in clockwise rotation. Thanks, Lee

 

[gwittman]

I have one that I bought for my 70 2800CS but it was not the correct one for my car. I will compare it to your photo to see if it looks correct for your 73.

 

[sfdon]

You have an early switch
4 pins

Late switches have 5 pins and no longer need the relay under the fuse box

 

[RedRV8tor]

You have an early switch
4 pins

Late switches have 5 pins and no longer need the relay under the fuse box



View attachment 202960

Yes, mine is the middle, three-pronged switch. Is the InDak unit essentially plug and play once you find the leads to the fan motor? I have an InDac on order.
Thanks, Lee

 

[RedRV8tor]

I have one that I bought for my 70 2800CS but it was not the correct one for my car. I will compare it to your photo to see if it looks correct for your 73.

In the photo from sfdon, the unit I'm trying to replace is the center photo of the three-pronged switch.
Thanks, Lee

 

[gwittman]

I found it and it looks like the one in the center of the photo. I will try to get a picture of it tomorrow and post it.

 

[sfdon]

Yes, mine is the middle, three-pronged switch. Is the InDak unit essentially plug and play once you find the leads to the fan motor? I have an InDac on order.
Thanks, Lee

 

[rsporsche]

View attachment 202982

well, i guess than answers that ...

 

[sfdon]

Sorry- scootered in for a vintage port tasting..

 

[gwittman]

In the photo from sfdon, the unit I'm trying to replace is the center photo of the three-pronged switch.
Thanks, Lee

DM sent with photos.