my top wont go down - PeachParts Mercedes-Benz Forum

M&R · #1 09-30-2006, 08:04 PM

hello. today i started my 1996 sl320. i noticed that the light is lit up on both the switches for the top and the rollbar, and i was unable to put the top down. i do not have a owners manual, i orderd one 6 month ago and have not recived it yet, can anybody tell me what the problem my be, did i lock the top somhow? please help. thanx

Gilly · #2 09-30-2006, 08:44 PM

Are the windows dropping down when you try to lower the top or not?
Gilly

M&R · #3 09-30-2006, 11:16 PM

nothing happends. the switches stay lit, nothing moves, and does not even make a noise. my wife thinks it has somthing to do with the alarm? not sure how to work everything, still waiting on a manual. any ideas?. thanx

Gilly · #4 10-01-2006, 07:37 AM

See if the "express down" feature works on the windows. The first thing that must happen is the windows must fully lower. If the windows aren't synchronized they won't lower and that stops everything.
Gilly

M&R · #5 10-01-2006, 09:12 AM

i tryed the express down on the windows they both worked the first time, and the rollbar came up by itself. now the express down for the left door does not work, and i can not put the rollbar down, and the switches are still lit, do i have a bad window switch? thank you very much for your help. randy and mon

Gilly · #6 10-01-2006, 07:41 PM

Try resynchronizing both windows. Confused on why you say the roll bar came up by itself.
Gilly

M&R · #7 10-01-2006, 10:52 PM

how do i do that?. the rollbar came up by itself, i did not push the button. we did push the puttons several times before and nothing happend. my gues is that just finally got power?

thanx

Gilly · #8 10-01-2006, 10:54 PM

Get in the car and close the door, then raise the window, not byusing express but just the point before express, when the window is all the way up cointinue to hold the switch about another 5 seconds, window express up will then be synchronized.
Gilly

dkveuro · #9 10-01-2006, 11:12 PM

Quote:

Originally Posted by Gilly

Get in the car and close the door, then raise the window, not byusing express but just the point before express, when the window is all the way up cointinue to hold the switch about another 5 seconds, window express up will then be synchronized.
Gilly

Ditto red button too.

M&R · #10 10-01-2006, 11:14 PM

the windows are working fin on the express down. i dont belive it has express up i don't feel the posistion in the switch for express up. the switches for the top and rollbar are still lit, but no action is taking place, no noise or anything. you are a great help Gilly. tank you.

Gilly · #11 10-02-2006, 09:10 AM

What can sometimes help is to disconnect all 3 connectors on the RST computer and reconnect. The computer is in the small storage box behind the passengers seat on the floor, open that up and the computer is under the "floor" of that compartment, you feel up to trying it?
The windows should lower if they are up, this is the first thing the computer has to do, so until you get the windows to lower using the top switch, the top will not even try to work. You are correct, there is only an express down feature, I must have described it wrong. If the windows now both do the express-down, the RST should be able to lower the windows now. Sometimes the RST computer can somehow "lock up". Disconnecting the 3 connectors can help. For some reason disconnecting the battery doesn't have the same effect as pulling the 3 connectors.
Gilly

dkveuro · #12 10-02-2006, 09:46 AM

Had one of these cars in here about 4 years ago...regular customer. Rollbar deployed whilst driving through town.

Was told by MB tech' at MB of OKC that the red 'top' button needs held on for 4 to 5 seconds with ignition on. ( KOEO.) to sync' the system.

No go...sent computer to be checked...no fault found..... all position switches where okay .

Sent vehicle to dealer due to now 'off lease'.
Owner said he returned car to lease desk and they sent it straight to the shop.

I called next day to ask what they found...they said after plugging in 'star tester' the top operated as per factory.

Maybe...you could have Mb do same for you.

.

Gilly · #13 10-02-2006, 09:58 AM

They might have accomplished the same thing by omitting having the computer checked out, in other words just disconnect and reconnect the RST module.
Gilly

M&R · #14 10-02-2006, 03:14 PM

thanx, i will try it when i get hme from work.

Gilly · #15 10-02-2006, 03:27 PM

OK. Oh wou'll need to actually remove the module from the actual floor of the car to get all the connections removed.
Gilly