2002 S 500 W220 Realtor of MI
Thread Starter
Newbie
Joined: Jan 2013
Posts: 7
Likes: 0
From: Michigan
S550 & S500
2002 S 500 W220 Realtor of MI
Greetings fellow Benzer's,
I'm having several issue's with my S 500 and I'm hoping that your experiences will ultimately lead me to successfully repairing some if not all the issue's.
1) My AC keeps reverting to "off" position after deleting codes. After restarting engine and AC, it is blowing hot on driver's side and cold on passenger side only for it to go back to "off" position on it's own.
I have reset it several times now and the same thing happens over and over again! (Note that prior to learning about the code and resetting modes, I took it to a mechanic who also did not know about the code & resetting modes, hooked up his AC Gauges to the system and thought it might have too much refrigerant in the system so he sort of bled or let out the ac coolant from the system which obviously didn't work and that was when I first learned about finding, clearing, and resetting process).
2) My trunk does not open via electronic commands, I can only open it using the actual manual key and when I open it using the key, I see that the driver door trunk release button light is lit which tells me that there is power.
3) The rear window sun shade seems to only work when it wants to and after several attempts of pushing the button.
Happy & Hopeful to be a part of the Forum!
sdkwolf :-)
I'm having several issue's with my S 500 and I'm hoping that your experiences will ultimately lead me to successfully repairing some if not all the issue's.
1) My AC keeps reverting to "off" position after deleting codes. After restarting engine and AC, it is blowing hot on driver's side and cold on passenger side only for it to go back to "off" position on it's own.
I have reset it several times now and the same thing happens over and over again! (Note that prior to learning about the code and resetting modes, I took it to a mechanic who also did not know about the code & resetting modes, hooked up his AC Gauges to the system and thought it might have too much refrigerant in the system so he sort of bled or let out the ac coolant from the system which obviously didn't work and that was when I first learned about finding, clearing, and resetting process).
2) My trunk does not open via electronic commands, I can only open it using the actual manual key and when I open it using the key, I see that the driver door trunk release button light is lit which tells me that there is power.
3) The rear window sun shade seems to only work when it wants to and after several attempts of pushing the button.
Happy & Hopeful to be a part of the Forum!
sdkwolf :-)
Thread Starter
Newbie
Joined: Jan 2013
Posts: 7
Likes: 0
From: Michigan
S550 & S500
2002 S 500 W220 Realtor of MI
Hurrah!
After some thought, I was able to get the AC working fine by recharging it, and is now blowing cold air from all vents!!
The trunk and sun screen issue's still remain unsolved.
sdkwolf
After some thought, I was able to get the AC working fine by recharging it, and is now blowing cold air from all vents!!
The trunk and sun screen issue's still remain unsolved.
sdkwolf
MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,473
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
The trunk is unlocked (and "soft-closed") pneumatically.
First step is to go to the right rear floor light, located behind the right-rear passenger's heels. Pry it from the carpeted wall - no need to disconnect it. Locate the yellow 20-Amp fuse near the inboard end of the fuse row behind the light. Take the fuse out, and check it. Replace with a new 20-Amp fuse if it is bad, put it back in if it is good.
Try the trunk unlocking using both the key fob and the switch on the driver's door. If the trunk unlocks for a few times, then stops working, you have a leak in the trunk pneumatic actuator, or the lines going to it. The PSE (Pneumatic Service Equipment) control compute monitors the pneumatic operations, and if the operations take too long to complete, the computer will disable that operation to avoid burning out the PSE air pump.
First step is to go to the right rear floor light, located behind the right-rear passenger's heels. Pry it from the carpeted wall - no need to disconnect it. Locate the yellow 20-Amp fuse near the inboard end of the fuse row behind the light. Take the fuse out, and check it. Replace with a new 20-Amp fuse if it is bad, put it back in if it is good.
Try the trunk unlocking using both the key fob and the switch on the driver's door. If the trunk unlocks for a few times, then stops working, you have a leak in the trunk pneumatic actuator, or the lines going to it. The PSE (Pneumatic Service Equipment) control compute monitors the pneumatic operations, and if the operations take too long to complete, the computer will disable that operation to avoid burning out the PSE air pump.
Member
Joined: Jan 2017
Posts: 104
Likes: 34
From: Northern Virginia
1994 E500, 2002 E320 wagon
I also have troubles with the power trunk in my 2005 S55. The lid will raise via the button on the driver's door, the button near the license plate and with the key fob. The problem though is that the lid doesn't remain in the raised position for very long. After about 10-20 seconds the lid will begin to come descend. Any ideas as to why the lid won't stay in the raised position?
