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Old 12-11-2002, 10:08 AM
Registered User
Join Date: Jul 2002
Location: Trenton, NJ
Posts: 248
Cold Feet

Like many others, I learned from trial and error (and posts here) that the heat to the rear in my 560SEL comes from under the seats, not the center consol. Great. But why do I get cold air in the driver's footwell and for the left rear passenger but plenty of warm air everywhere else?

It just dawned on my that I've been getting out of the car with colder feet than I had getting in every day this week.



'87 560SEL 267K (177K on motor) Blue/Blue
'98 Buick LeSebre 60K (wife's car)
'56 Imperial Sedan 124K
Past Cars:
'67 Dodge Monaco 130K (Sold)
'87 Chrysler 5th Ave 245K and going strong (sold)
'73 Plymouth Satillite 175K (sold)
'96 Chrysler LHS 80K (totaled)
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Old 12-11-2002, 04:48 PM
Registered User
Join Date: Oct 2002
Location: Portsmouth UK
Posts: 170
Hi Jeff

I am not an expert nor am I familiar with your particular model.

Merc heating is normally controlled independently for each side.

The control wheel activate a potentiometer which in turn via the control circuit drives one element of the 'duo valve' which allows more or less water (at engine operating temp) through the heater matrix.

I drive an 'old' 230 TE and the driver side heater control is lazy and I often have to kick it into action by winding the control wheels on both sides from stop to stop until it eventually kicks in.

I have promised myself to strip out the control board and give the potentiometers a squirt of pot cleaner and lube - but you know how it is - there are just so many things to do and so little time;-)

I am sure an expert will pop up and do better for you.

Good luck - in the meantime wear really thick socks!!

230 TE (W124) 1989 with 153,000 miles on the clock - hoping for at least another 100K
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Old 01-14-2004, 10:10 AM
MikeTangas's Avatar
Senior Member
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430

Have you figured this out yet? I ask because now that I am up in the single digit temps, and below, I'm finding my feet to be a little cold. The passenger side footwell is nice and toasty but the driver's side is suitable for hanging meat. If I had a nice warm pair of Sorels I probably wouldn't whine, but I only have tenny runners and combat boots.

Hopefully you've found a quick fix because it is a little too cool to hang out from under the dash trying to figure it out, especially since I have no garage to work in. I learned last weekend that you lose the fine motor skills quickly at sub-zero temps

What a PITA not having a place to work out of the weather.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
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Old 01-14-2004, 11:21 AM
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Mike Tangas

Welcome to the Great White North, you California pantsie.
2007 C 230 Sport.
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Old 01-14-2004, 09:28 PM
Registered User
Join Date: Dec 2001
Location: LaPorte, IN
Posts: 400
Hey Tangas...

Port Huron is only 6 hours or so from me. Come on down, use the garage and the small but effective kerosene heater. Shoot, i might even feed you a meal. What's your preference--Hamburger Helper or Tuna Helper? I'll see if i can round up a little guacamole so we can call it California Helper. All kidding aside, it's a humble place but you would be a welcome guest.

Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)
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