hooligan

after adding 134 i ran the motor for a bit it was still kicking the fan into overdrive but then it settled down and it seems a bit colder inside. ill see when it gets super hot out today and try it again.

when i held down the ac off/rest button a number menu came up but i cant find any info on what it is for or what i cn do with it. any info on this menu?

Toadster

Hulk

2008AMG63

What would I need to change the setting to -10?
I've been following some threads but thee wasn't anything clear! ... Do you mind telling or pointing a thread to what is required?

Yacht Master

Here you go, it is an change done with STAR. This link is from the stickies.

https://mbworld.org/forums/3814285-post25.html

Look close and you will see the reference to this change effecting the engine temp and A/C.

hooligan

ok i can now completely concur with yacht about the gauge **** not being the right way. now im blowing warm air and the damn engine fan wont shut off for nothing..tomorrow she goes in and i hope i didnt screw it up too bad. ill report back. thanks for the info too bad i dont listen for **** lol

Hulk

Problem with these compressors is when you over fill you can actually do harm to the compressor , I hope all is ok with yours

hooligan

this thing was purging like i had nos lol i ran from it for a sec.lol and that was with the gauge reading in the middle of the green zone so im fairly certain she is over full. im hoping a evac and refill will prove to be a good thing

2008AMG63

Thank you. It clearly indicates For engine or A/C!


But there is an error with the indications.... They say to change to -10, but As I read the screenshot it says the opposite ... A positive will make the fan to start earlier!

PS: In fact I went into the DIY and yes there Is that correction mentioned!

hooligan

ok took it in to have it run through today..
1. i had over charged the system and that caused it to blow warm air.
2. After a evac and refill to the proper weight the air was cool and blew better through both sides.
3. they used a ultraviolet additive like the dyes and we will see in a few days if there are any small leaks. it held pressure for over an hour without any dropping in the readings.

i would now never recharge myself. MB just does stuff different.

JamesMarshal

I just bought a 2003 SLK 320 and I'm not impressed with the AC. Went and picked up the car in Dallas. Shortly afterwards, it started blowing hot and never recovered. Took it to a dealer who said the system was over-charged. Went to get in the car and they had it blasting hot air. After I drive for a while on the highway it blows cold. Takes a while for it to cool off and for those short trips, it never gets cold. Stopped to talk on the phone in the rain and the whole car fogged up on the inside. Can't wait to get it to my indy guy.

Toadster

wife commented yesterday about how cold the A/C is in the 55 - almost gave us a headache it was so cold

+1 for the -10C mod!

xpl0sive

well i looked in DAS and didnt see any country or region dependent settings. a lot of settings in German that I had no idea what they were and didn't feel like changing, but one thing for sure, theres no special setting for Gulf Countries

cupertino

Great link & info.
My AC blows hot 90+ air for first 2 minutes after car start. Then blows cool air not COLD air. Dealer say its normal.

I have been laugh at for this poor AC performance.
Now, I just have to find a star diagnostic tool.

Are any of you guys in San Jose, Ca area that can help me do the -10 mod ? Or can you suggest a link to purchase a Star Diagnostic C3 tool ?

Thank you guys.

I Like Soup

My AC sucks, but then again, I live in AZ. I travel about 65% of the time and have rental cars all the time and those rental cars are always freezing me out. With that said, I most likely need to recharge the system, but I never remember the AC working that great in my 55.

michalk

Mine does the same thing. Did you ever solve this problem?

BagMan

My A/C sucked and it turned out to be the low side hose collapsing. you can't see it until you remove the hose. There is a TSB for it though. Had it replaced and it helped a lot.

In my experience, the 4 zone AC of my E55 and E500 never blew as cold as the standard 2 zone system in the E320

mkiv_tdi

Bag, did you do do the fix yourself, or did you let the dealer do it? My fan is simply "cool" if it's 90+ outside.
On cooler days(ambient), it'll freeze you out.. But I don't want to pull the system apart to find out that the hose is fine.

For reference, my black '02 Civic could freeze you in less than 15 seconds after spending 5 hours in a 100* day.


I had it checked on the gauges and it's not leaking.

Any obvious indications that it might be the hose? Where else should I look to?

BagMan

The dealer did it.

The hose is not expensive, but you'll need to capture the refrigerant when you change it. I think ECS tuning had the best price when I was looking about a year ago.

I also noticed that sometimes when I manually change AC fan speeds, it gets a little weaker after a couple of days. Then I push the "Auto" button and the AC kind of resets itself.

Denroll

My a/c was atrocious. I had the low pressure hose replaced. Since the system was going to be evacuated, I went ahead and had the desiccant canister replaced. Both parts can be purchased from ECS Tuning. The hose is around $90 and the desiccant canister can be had for around $30-40.

After having the pars changed and refilled with the correct amount of coolant, it is much better. If I aim my laser thermometer down inside the vent, I can see temps in the low 30s when it is 100 degrizzles outside.

The only problem I am having is with airflow. It just sucks. My mode selector radial switch doesn't do anything, so the flap to close off the feet vents doesn't close. I haven't found anyone else with the same problem, so I don't know what part to replace.

Oh, and even with the improvements with the current maintenance, the system in my 2013 Fusion flat out embarrasses the one in my Benz. Even my old '97 Camry with 175k miles had better a/c.

mkiv_tdi

Got links to the hose?

Also, how difficult to DIY and approx. hours? I'll add this to my "winter projects" list.

Denroll

I think this is it. Website isn't working on my work computer.

http://www.ecstuning.com/Search/Site...815/ES1768033/

The DIY shouldn't be that difficult on the hose swap itself, but you will need to have the R134 that's in the system evacuated and then have the system filled afterwards. Most of us non-professional mechanics don't have the equipment for that.

bierry

In A/C mode, do your 2 center dash vents each produce the same volume of air? My passenger side vent always blows a significantly higher volume than the driver's.

Denroll

When you cycle the mode selector thingy, does it change (face/feet/defrost)?

Hulk

My blower fan just gave out, smelled burning and done. Removed it and will go pick up the part later. Really good DIY on YouTube, not hard to replace