merc clk430 convertible 2001

greetings

Hi there anyone know the answer. I put my key in and it dosent always engage and click so I can turn it . Why is that ? Also just drove it home and a massive bang underneath - oh dear - any ideas what that could be ?
Thanks

fishybusiness

I put my key in and it dosent always engage and click so I can turn it

Could be the remote batteries, you are better off posting in one of the Mercedes owners forums

http://forums.mercedesclub.org.uk/

http://www.mbclub.co.uk/forums/

Also just drove it home and a massive bang underneath

Does it drive any differently now?