Norbert Barthle, the party's spokesman on budgetary matters, accused Hollande, whose poll ratings have fallen faster than for any modern French president as the economy has slid into recession, of playing to a domestic audience.
He said the EU Commission had already been too generous in giving France a further two years to bring its deficit below the bloc's 3 percent ceiling after Paris conceded it would miss the target this year.
"France won't be able to bank on such indulgence again," he said.
Paris says it expects to bring its deficit back under the upper limit well in time for the new 2015 deadline and is already preparing to reform its generous pension system.
Wary of upsetting negotiations on the issue, Hollande said this month the French people should expect to have to work "a bit longer". In Merkel's presence, he said the reform would be pushed through this year.
However, he appeared to rule out a new overhaul, urged by the EU executive, of special early retirement deals for groups such as train drivers, saying they had already been reformed.
French officials were also irked that the Commission warned Paris against raising pension contributions to balance the system by 2020 on the grounds that it would make high French labour costs even less competitive.
Hollande is looking to increase the contribution period for a full pension, and possibly the rate, rather than lift the statutory retirement age or cut final benefits.
The Commission specifically listed an increase in the retirement age as a measure that France should examine.
Relations "As Normal"
Merkel and Hollande were at pains to insist that Franco-German cooperation, one of the historic drivers of EU integration, is working well.
A joint paper on future euro zone governance to be sent to fellow leaders ahead of next month's EU summit went somewhat further than expected, while remaining within the limits of the current EU treaty.
Officials on both sides had played down expectations of any major European policy initiative before Germany's September election when Merkel will seek to win a third term.
Merkel said the currency area needed more economic policy coordination because recently tightened budget rules were still insufficient to prevent a repeat of the euro zone's sovereign debt crisis. She did not repeat past calls for treaty change.
Merkel's visit, to end with a private dinner, has also come with Paris and Berlin at odds over whether the EU should risk a trade dispute with China by imposing duties on its solar panel exports in the coming days - a move Germany has opposed.