Recently, I purchased a 1992 400SE. Upon reading the owners manual, I became aware that there is a pneumatic door assist in the normal closing of the doors and trunk lid. This system is not functioning at the present time. ( None of the doors or the trunk lid pneumatically close, they must be "slammed" closed. ) Is there something simple that can be checked by me before taking it in for service?
Thanks in advance....
Dan
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