Thank you for the information. That PDF file is incredible. I really appreciate that. The SL is at the Dealer's as I write this...took it in this morning. So far, the dealer isn't quite sure, but the tech "thinks" he found a leaking piston in one of the pumps ( I called for a progress report). We'll see.
Well....Good news. The Dealer found the culprit. Indeed, the Left vario roof (open/close) hydraulic cylinder showed evidence of leaking. It seems that the piston appeared rusty and the seal was cracked. Using a dental mirror, after exposing this piston in its awkward position, they were able to see the leakage. However, there is no puddle beneath it so somehow the minute amounts of hydraulic fluid somehow escaped this area.
How did this happen? Don't know. This car, though sat unused for quite a long time. I bought it with less than 8000 miles on it last year, and the previous owner had 10 cars in a thermostatically-controlled garage. I'll never know how it happened, but at least I will have a good summer without fear of the top freezing in half-opened position.
No one seems to be replying to this. That's OK. I think I found out the answer to my problem today. Low hydraulic fluid in the trunk where the hydraulic container is located. Why? Still don't know. It's going to the Dealer on Thursday. We'll see.
Stan
I am having the same problem. Can you tell me exactly where the hydraulic container is located? Thanks!
Stank (spilok) started this thread on another forum: My hardtop goes up & down "sluggishly"! - MBWorld.org Forums. It shows the location of the pump and describes a procedure that may help a slow-moving top. If that does not help, then the first step would be to check the system hydraulic pressure. To do this you need a liquid pressure gauge and an adapter from Mercedes to connect the gauge to the pump. The adapter part number is 230 589 07 63 00 and costs about $20. The pressure from the pump should be around 150 PSI, if I remember correctly.
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