Is accumulator for 560 SEL side specific? I purchased a set of them on Ebay and put both of them on the car. However, I could not, for one full hours, put the metal line back into the driver side one. I had not problem on the passenger side. I could keep turnning but the screw just will not bite in.

I really don't want to get the other one out just to find out there is not difference which side it is.

Please help.