Lewis Hamilton has called on Mercedes to improve its reliability heading in to the second half of the season.

While Mercedes has been dominant in terms of performance so far this year, reliability problems have increased in recent races with Hamilton retiring from the Canadian Grand Prix and exiting qualifying early in Germany and Hungary, while team-mate Nico Rosberg retired from the British Grand Prix.

Agreeing with Toto Wolff's remarks that reliability has been a cause for concern recently, Hamilton wants an improvement in after the mid-season break.

"I'm happy with our performance so far this year in terms of the pace we have in the car," Hamilton said. "The team have done a great job with that. We just need to work on the reliability, and I know that's the priority for everyone back at the factories."

Despite the problems, Hamilton was keen to thank his mechanics and engineers for the hard work put in to help him recover from tough Saturdays at the last two grands prix.

"I have to say, though, that over the last two weekends in Germany and Hungary in particular, the guys have been amazing - I mean, really amazing. It's tough for everyone involved when reliability comes into play. To see these issues happen after all the long hours and hard work that they've put in - I know it hurts them as much as it hurts me.

"To then fight through, get the car back together, get me out there and not give up or lose hope - I can't thank them enough for everything they do and that's what's going to keep me going right through this year. There's still a long, long way to go and I know that both the guys and myself will keep pushing right to the chequered flag in Abu Dhabi. We'll be back stronger than ever in Spa."