|
|
|
#1
|
|||
|
|||
My brothers 87 300E (gasoline motor) 190,000 miles, started downshfting on the highway for no apparent reason when the AC is on. He just had the auto tranny serviced : fluid change & filter, also just had a brand new AC compressor put in,new serpentine belt, new fan blower (fan only blows on highest setting!)
What the hell is wrong with this thing? I thought the fluid may be the problem. The guy who put the parts in (a moolighting Benz tech) said just to shut the AC off. Whats up?
__________________
Patrick Leber '84 190E 2.3 '83 Porsche 944 (track car) '84 Porsche 944 (parts car) 85.5 Porsche 944 (sled) |
#2
|
||||
|
||||
Good Lord! Who's your mechanic? Larry, Curly, or Moe?
An old Groucho Marx dialog: Patient: "Doctor, it hurts when I do this" (patient bends elbow) Doctor: "Then, don't do that"! Seriously, it sounds like the compressor sensor hasn't been connected. It's job is to adjust the idle whenever the compressor kicks on. It may be since the electronics hasn't determined that a compressor is present, when the clutch engages, it senses a load and determines that it is due to a change in driving conditions and downshifts to give you more power. Just a theory. Wait for another expert to reply to your post...
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car |
#3
|
|||
|
|||
Thanks G-Benz
Where is that compressor sensor??
When Curley put the blower moter in he didnt change some switch that is located under the blower. Now he has to go back in there all over again. So the fan only works on the max setting. Do you think this is related to the compressor switch??
__________________
Patrick Leber '84 190E 2.3 '83 Porsche 944 (track car) '84 Porsche 944 (parts car) 85.5 Porsche 944 (sled) |
#4
|
||||
|
||||
I'm am absolutely not an expert on the A/C on these cars, so I'm just guessing here. I know your model is equipped with one.
I have to go back and look at my manual to see where that sensor is located. I'll do some research on the A/C system as well and see what I can dig up for you. My real concern is that I hope your mechanic is doing this work with the battery disconnected. The climate control unit (the one on the console with all of the switches) is expensive, and is prone to failure anyway as your car ages. We don't want to aggravate the situation by having him work on your car while the electrics are hot, as it won't take much on his part to fry the unit, or anything else on your dash.
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car |
Bookmarks |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Rebadging '87 300e | emr0591 | Detailing and Interior | 6 | 09-04-2007 09:12 AM |
FS 300e w124 PARTS ON EBAY!!!!!!! | 6cndmbz | Mercedes-Benz Used Parts For Sale & Wanted | 4 | 09-20-2003 12:14 PM |
1987 300E parts car SF Bay Area -- Cheap or Free if you tow it once for me | marinmbfan | Mercedes-Benz Used Parts For Sale & Wanted | 2 | 12-10-2002 02:30 AM |
What is the most common Benz? | vanakin | Off-Topic Discussion | 14 | 12-07-2002 05:34 PM |
downshifting, automatic, '89 300E | cem | Tech Help | 1 | 10-23-2002 03:16 AM |