HI there,
Thank you for the donation,
I am not a Jag mechanic but reading the operation system, i see that there is a by-pass valve that you turn to manually operate the roof, now if that valve was not re set i feel that the hydraulics will be over ridden and not operate the roof,the 1/4 vent is electric and not governed by that part of the system, just a thought have a look at the valve.
mark (mhpautos)
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Thursday, July 16th, 2009 AT 5:19 AM