I´ve bought them two years ago. They don´t fit with the electricity.
Note for all Murena owners.
The way the gas struts for the rear glass carry the electric current for the heater rear window is that the centre chrome part of the strut is connected to a metallic piston inside the larger black cylinder of the strut, with metal ring seals just like an engine piston ring and seals. (except much smaller obviously!) These ring seals transfer the electrical contact to the inside of the metal cylinder of the gas strut, and from there via the electrical tag to the H.R.W. element. At the base the electrical wire from the loom connects to the lower part of the strut BUT the positive side (on the right) must be insulated from the chassis otherwise you get a direct short to earth. So the pivot at that end must be plastic and not metallic! There was a period when struts were being supplied with a metallic pivot at that end - DO NOT try to connect the H.R.W. supply on the right if you have a strut with a metallic pivot that side. The left side strut bottom pivot can be metallic as that is going to earth anyway.
In the U.K. I get the stuts re-gassed and unless the seals are totally shot, they are as good as new. The pressure must be 210 Newtons, no more otherwise the glass will shoot up and slam against the top stop and eventually something will get damaged. I have seen struts with 220N and 240N and they are no good, but even if that is what they were originally (probably meant for another car, not the Murena) you can ask for them to be repressurised to 210N and remarked. In fact the company that do mine, mark them with the pressure and the date the work was done. They actually retain them 24 hours after re-gassing to check if they are holding pressure.
The cost is much less than new struts even if you can get new ones!
One tip, I always remove the pivots and electrical tags from both ends, before I give the struts to the company for re-gassing as they don't need them, and if they don't have them they can't loose or damage them! They easily unscrew off and back on. I simply refit them upon return. Also if the contact seems poor or none at all, try rotating the chrome strut so the piston rings inside rotate to get a better contact.
Roy
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