After I lock my 2001 clk 430 with the key remote the inetrior lights stay on and the exterior lights start flashing, what can I do to fix this?

I believe you do not remove the lens - rather you open the trunk and find the back of the lamp (you'll have to remove the panel in front of it) and remove and change the bulbs from inside the trunk.

The remote key has a 2 coin batteries fitted. These may have gone flat. Point the keyfob at the car and watching the key press the unlock button. On the key fob there should be a small LED light which blinks. If not, the batteries need replacing. Try this YouTube video. I think they are CR2025 type batteries.

Sounds like you need to have the pass lock system checked. The light is suppose to flash when the theft system is armed but not stay on solid. It may not be activating the theft system

The springs should have viscous fluid in them that prevents opening fast. Replace again.

From http://www.autoevolution.com/news/how-to-read-the-dashboard-lights-1370.html

Warning light - it signals an unidentified problem with your car; it usually requires the car to be serviced.

Test battery charge, jump the battery to start and check battery charge, sound like a alternator or voltageregulator wrong there.

left tun signal means you most likely ha a bulb blown on that side.turn key on turn on signal light to each side and check your lights out side for one thats not working.

make sure that you have the holder for the top in the trunk in position correctly and that the 'nubs' on each side of the plastic have triggered the switch on the right side when in position

its commonly known as the bottom splitter, it splits the air between the bumper,and the ground,

Hi Joe here, The problem with your a/c is a sensor. Most likely the pressure sensor. You need to have the vehicle scanned to find out which sensor it is.