Sorry to hear no joy. The limit switch for the tonneau cover can be accessed without any disassembly. If you have the wrench to unlock the cover from behind the rear seat, raise the top manually. You then need to raise the bow (rear) of the top and then lift the cover. You'll see the limit switch on the driver's side, the lining for the soft top compartment is held in by plastic rivets.

The other limit switches can be inspected once you remove the side interior panels, not hard or time consuming. Once the seat bottom and back are out the panels just screw in and one hex screw at the rear. That would allow you to inspect the connections. If you lost both seat belt presenters something may have come apart. From what I could see the presenters have separate relays. You may want to do that before swapping out the controller.

The fact that your CST switch is always lit is another issue, usually that means it is available to operate the top but not here.

Something is telling the controller that all systems are not "go" it must think the roll bar is not fully retracted or the windows are not down. Is the roll bar inop using the dash switch? If you can raise and lower it I would cycle it a couple of times.

If you manually raise the top is it also not responding to the switch if you try and close it? From what you posted before about tricking it into finishing the lowering cycle your CST controller is doing something.

Appreciate the explanation. I'll check to see if I have the top wrench - then try unlocking the cover as you suggest.

__________________
Neil.


1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten

Well, the advice to manually raise the top worked out great. Thanks

My top problem was caused by this tiny screw:


It lives inside the tonneau cover and holds the tonneau latch limit switch (a micro switch) in place. The screw is in the middle of this picture:


Zoom out to show the underside of the tonneau cover. The latch assy is in the middle of this picture:


The latch assembly is normally hidden behind a metal plate held on by 11 x M10 bolts

While testing the switch it quickly became apparent that the screw was loose - allowing it to move about. Took a couple of attempts to get the switch position just right, but the screw is now secured with a dab of blue loctite and the top works great.

Now, I just need to get the seat belt presenters working once more....

Thanks again

__________________
Neil.


1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten

Good to hear. Great news. The tops are a bit fussy and one little thing out of adjustment and......

Presenters--my drivers' side did not work when I got the car, when I had that side interior panel off to get at the cylinders I noticed the power connector had become unattached. Plugged it in and fixed. Might be that simple. The nice thing is the car is fine without them.

Unplugged the belt presenter module when I disconnectied the CST controller. Completely forgot about it. AOK now.

__________________
Neil.


1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten