My 78 300SD has no heat. A few years ago it didn't have heat and i took it in and had the amplifier replaced. That fixed it and had heat. Last winter my heat stopped, there was clicking behind the glove box, intermittently the heat wouldn't work and I figured the amp was going again, but never got around to replacing it. I spent all winter with no heat and cold defrost.

it getting cold and I want to get a part time job delivering pizza so I need heat this winter. I replaced the amo with a known working one and no heat. All the buttons work and blow air (cold) so I guess it's the evil servo this time. Or could it be the thermostat?

If it's the thermo, I can replace that pretty easily, if it's servo, I cannot afford to replace it so it will be bypass time. I did a search and there are many many threads on it, but I want the best one and hopefully one that give my feet heat as well as hot defrost.

I know that every winter this comes up, so please have pity and patience with me.

Thanks and glad to see all the familiar names still here!

Ginny

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Ginny in Denver-ish
78 300SD, 265K (mine)

Bypass is all of a $5 fix. PS cannot think of a worse pizza delivery car. Honda civic and the like were made for that role.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

MB use a thermostatic cabin heat control that constantly samples cabin temp, this lives just "behind" the glove box....

If I had a beer for everyone who pulled a dash apart / duo valve / etc only to find it was the sensor I could float a battleship.

Is this the amp? I just replaced that to no avail.
If not what does the sensor look like? Photo?

Thanks!

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Ginny in Denver-ish
78 300SD, 265K (mine)

So yall still got the Pizza shop up and flying??

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

bump for parts pix LOl

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Wie lange wird Ihr Auto leben?

on the 116.120 the location is inset into the forward most center dash point.

Hidden under the (By Now BRITTLE)

Little Square Plastic louvered grill just under the Windshield ,inset into the Dash.

Attached Thumbnails

   

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'84 300SD sold
124.128

Hey Jimmy! Nope, we turned the bar into a sit down pizza/ice cream place in April last year. We closed it July last year because of lack of funds. We were literally out of money everywhere! We used a mortgage payment to pay all the employees (and then went to family only working it) and the utilities and taxes for the month of june. I was working open to close 6 days per week, my 15yo daughter was working 60 hours and son was working 45 hours. My husband worked 12 hours on Sundays so I could catch up on sleep. We tried our best. We put every bit of money, sweat and time we could but it just didn't happen in time for us. If I had just had another $10K I could have ridden it out until shcool was back in, but I just couldn't find money anywhere.

So i am back in school, skating roller derby, and having nights with my family. We are al happier, healthier and I'm a straight A student. Sociology major.

But cold in my no-heat car!

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Ginny in Denver-ish
78 300SD, 265K (mine)

Great! Thanks for this, how do I know it would be this sensor?
All my buttons work and blow, just cold air. Would that happen if the temp sensor is dead? Would this also happen if the servo unit is not working? Would it happen if the thermostat in the coolant is dead?

Is this sensor easy to get or will I be looking high and low for the part?

Thanks!

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Ginny in Denver-ish
78 300SD, 265K (mine)

just a bump. . .

need a little more info before I start this project.

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Ginny in Denver-ish
78 300SD, 265K (mine)

Here is a manual from the Imperial Club, orginally posted by KERRY.

http://www.imperialclub.com/Repair/Lit/Master/281/index.htm

Info on the servo

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works