Third pedal/switch in left footwell - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 09-03-2011, 11:54 PM Thread Starter
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Third pedal/switch in left footwell

I have noticed a third switch foot pedal in the left footwell of my automatic transmission '75 450SL. It is on the far left, behind the parking brake. What is it called and what does it do? The owner's manual or Chilton's repair book have no info on it. I do not have a dead pedal in this car.
Thanks.
Shawn
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post #2 of 6 (permalink) Old 09-03-2011, 11:59 PM
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Originally Posted by Shahryar View Post
I have noticed a third switch foot pedal in the left footwell of my automatic transmission '75 450SL. It is on the far left, behind the parking brake. What is it called and what does it do? The owner's manual or Chilton's repair book have no info on it. I do not have a dead pedal in this car.
Thanks.
Shawn
Its either the foot rest or the high beam switch.

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post #3 of 6 (permalink) Old 09-04-2011, 12:09 AM Thread Starter
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I thought so too at first. It is not the high beam switch, as I tried it and no changes, and the high beam switch is on the column.
I don't think it is a foor rest, as it is way up above the level of the other pedals, right up on the back wall of the footwell. It seems to be spring loaded and the rubber covering is about 2x4 inches. I noticed it after removing the panel under the steeing column to access some relays and wiring.
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post #4 of 6 (permalink) Old 09-04-2011, 03:39 AM
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It might be the foot pump for the wiper fluid. It might have an electric connection too, for the wipers.
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post #5 of 6 (permalink) Old 09-05-2011, 02:56 AM
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High beams are on the turn signal stalk, same as a modern car. That third thing is indeed a washer switch. It activates the wipers for a couple swipes and forces water to jet onto thewindshield. It's basically a water filled bulb that when stepped on, sprays the water. I retrofitted mine so that mashing the thing would also mash an aftermarket switch, which would turn on an electric water pump.
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post #6 of 6 (permalink) Old 09-07-2011, 11:15 PM
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Switch for windshield washer pump, also turns on wipers. Take care not to stomp on it too hard, as it can be broken. Not the switch itself, but the plastic mounting/support assembly.

You also might want to slide over onto the 107 forum, it specializes in the '72-'89 SL/SLC's.

R/C107 SL/SLC Class - Benzworld.org - Mercedes-Benz Discussion Forum


Very active forum with a lot of people.

Remember: It's not just a car. It's an Adventure.
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