Found this, which may help; but it's not simply 15 years; it's 15 years after the last product has been manufactured.
(broken link removed)
MDD:
The manufacturer or his
authorised representative must, for a
period ending at least five years, and
in the case of implantable devices at
least 15 years, after the last product
has been manufactured, make
available to the national authorities:
? the declaration of conformity,
? the documentation referred to in
the seventh indent of Section 3.1,
? the changes referred to in Section
3.4,
? the decisions and reports from
the notified body as referred to in the
final indent of Section 3.4 and in
Sections 4.3 and 4.4,
? where appropriate, the certificate
of conformity referred to in Annex III.
AIMD:
Annex 2 section 6.1
For at least 15 years from the last
date of manufacture of the product,
the manufacturer or his authorised
representative shall keep available
for the national authorities:
? the declaration of conformity,
? the documentation referred to in
the second indent of Section 3.1, and
in particular the documentation, data
and records referred to in the second
paragraph of Section 3.2,
? the amendments referred to in
Section 3.4,
? the documentation referred to in
Section 4.2,
? the decisions and reports of the
notified body referred to in Sections
3.4, 4.3, 5.3 and 5.4.
Setting the Medical Device Lifetime
https://www.ombuenterprises.com/LibraryPDFs/Setting_the_Medical_Device_Lifetime.pdf