Late update - first step of servicing all the links and mechanisms with CRC Marine lubricating product (removed door cards for access) cured the problem. Central locking now works fine all round, when using the key and from inside etc.

Hi Volvo forumites I have a 1998 2.0 LP turbo and the car has a central locking problem - is it now not centralised, it won't open the other doors. The drivers control lock has become stiff and it takes a bit of effort to even turn the key and open the drivers lock alone. On the inside it is a diffe...