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#1
01-13-2009, 08:18 AM
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300te heat issue
1989 300te. Is it my car, or do all older 300's have such poor heat. I have heat as the car is rolling, but once stopped (light, stop sign, etc), the air exiting the vent turns cold.
Actually, this happens with the A/C also (obviously the reverse: cold when driving, hot when idle). 
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#2
01-13-2009, 08:45 AM
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Thermostats can cause heating issues, does you engine get to operating temp?
Unless the aux water pump is unplugged OR the heater valve isn't functioning properly, you should have enough heat to run you out of the car!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
01-22-2009, 11:54 AM
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I have a 91 300TE with little heat all the time....enough to take the chill out but not really keep warm. The climate control unit was replaced after the last one fried. The car reaches 80 even on the coldest days. I know there should be more heat but I do not know where to start! Thanks for any help I can get. I also checked the fluid level and the thermosat was replaced not long ago.
Thank you
__________________
Paul 1991 300TE (280,000) 1985 300TD (432,000 miles - retired) 1976 300D (225,000 - retired) 1975 300D (165,000 - retired)
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#4
01-23-2009, 10:39 AM
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replace the mono valve element[heater valve]they usually go byebye every three yrs.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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#5
01-23-2009, 01:57 PM
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is that like the one I recently replaced on my 300TD....On the passenger side firewall?
I looked up both on the parts page and found neither.... duh...is this the beast? I see there are two different ones...I will have to check my dates and please give me a clue where to find it. thank you!!!!!!!
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Paul 1991 300TE (280,000) 1985 300TD (432,000 miles - retired) 1976 300D (225,000 - retired) 1975 300D (165,000 - retired) Last edited by 300TD; 01-23-2009 at 02:21 PM.
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