it does put a load on the engine though, and pushes the needle up, especially in stop and go traffic.....
Auto or EC?
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 4,781
Likes: 3
From: Boston
'05 A4 1.8TQM6
when i leave it on auto, the power on the I4 suffers a little, well, cuz it's an I4, lol. But i'm getting use to it now...will this strain out the A/C compressor at all over time?
Member
Joined: Jun 2003
Posts: 157
Likes: 1
Originally posted by GDawgC220
when i leave it on auto, the power on the I4 suffers a little, well, cuz it's an I4, lol. But i'm getting use to it now...will this strain out the A/C compressor at all over time?
when i leave it on auto, the power on the I4 suffers a little, well, cuz it's an I4, lol. But i'm getting use to it now...will this strain out the A/C compressor at all over time?
The newer systems actually do not cycle the compressor on and off, but use a variable pressure compressor in order to keep it running all the time.
Commercial AC systems are moving toward the same style of compressor in order to have the system run all the time and lengthen the compressor life.
Using the EC button may actually shorten the life of your AC system.
MBWorld Fanatic!
Joined: Apr 2003
Posts: 1,252
Likes: 2
From: San Antonio, Texas
2016 BMW Z4 sDrive35i M Sport
The A/C does put a load on the I6 too. I notice a considerable power difference when I have it on, especially in the heat and when there's elevated engine temperature. I usually have it on Auto and the fan on 1, 2, or higher in the summer. I do the same in the winter except the temp on the climate control is considerably higher.
Member
Joined: Jul 2003
Posts: 180
Likes: 0
From: Houston, TX
98 MB C280
yea i got a 4 and it really really sux with the a/c on. lately the engine's going over 100. proly 110. it used to be around 90. kinda getting worried about the headgasket. ahh well. one thing i really hate on a hot day is when the air fades in and out on hte center vents while acceleration. anyway to disable this?
Trending Topics
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 4,781
Likes: 3
From: Boston
'05 A4 1.8TQM6
Originally posted by fast mayte
yea i got a 4 and it really really sux with the a/c on. lately the engine's going over 100. proly 110. it used to be around 90. kinda getting worried about the headgasket. ahh well. one thing i really hate on a hot day is when the air fades in and out on hte center vents while acceleration. anyway to disable this?
yea i got a 4 and it really really sux with the a/c on. lately the engine's going over 100. proly 110. it used to be around 90. kinda getting worried about the headgasket. ahh well. one thing i really hate on a hot day is when the air fades in and out on hte center vents while acceleration. anyway to disable this?
About that 100-110...i've never seen mine that high. Most is 100 and that was on a 100 degree day sitting in traffic. Usually, it's around 90 at most when stop and go on like a 80-90 degree day...maybe u should have that checked out?
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Apr 2003
Posts: 4,781
Likes: 3
From: Boston
'05 A4 1.8TQM6
Originally posted by fast mayte
yea i got a 4 and it really really sux with the a/c on. lately the engine's going over 100. proly 110. it used to be around 90. kinda getting worried about the headgasket. ahh well. one thing i really hate on a hot day is when the air fades in and out on hte center vents while acceleration. anyway to disable this?
yea i got a 4 and it really really sux with the a/c on. lately the engine's going over 100. proly 110. it used to be around 90. kinda getting worried about the headgasket. ahh well. one thing i really hate on a hot day is when the air fades in and out on hte center vents while acceleration. anyway to disable this?
About that 100-110...i've never seen mine that high. Most is 100 and that was on a 100 degree day sitting in traffic. Usually, it's around 90 at most when stop and go on like a 80-90 degree day...maybe u should have that checked out?
Almost a Member!
Joined: Feb 2003
Posts: 69
Likes: 0
From: Seattle
2000 C28 Sport
Running EC all the time can in no way damage the AC life. If you are worried about fluids moving, run the AC once a week for a little while just to keep it in motion. By shutting off the compressor and just keeping a vent, you put less work on the engine and save the AC. Less work should equal less ware. In any case, running the AC once a week or so is a great way to help it.
Member
Joined: Jun 2003
Posts: 157
Likes: 1
Originally posted by Brandon24C
Less work should equal less ware.
Less work should equal less ware.
Also, the additional load on your engine of the variable system when operating at a low cooling capacity is minimal. When your car needs little AC operation, the variable pressure compressor operates at just enough capacity to keep the evaporator at optimum temperature.
Also, if you're worried about wearing out the bottom end of your engine on your W202, you're getting your priority list all wrong. There are many things that are going to wear out or break before it will. The additional stress the AC system places on the engine will never matter in the life of the car. Change the oil and filter frequently, and that will be fine for hundreds of thousands of miles. On a typical Mercedes, it's the sub-systems that will cost you big dollars in repairs over the long haul. The AC system, electrical accessories, automatic transmission, suspension components, and so on, will all break several times before the engine needs attention.
For those with ACC equipped systems, set and forget the temperature and let the system work as designed, and you'll have the longest life from your system. Also, change the cabin dust filter often. Not sure about pre-FSS systems, but on FSS equipped cars, the interval is every time the FSS counter "zeros." On most cars that's about once every 10,000 miles. That will extend the life of your blower motor and evaporator.
