1994 mercedes E320, radiator light has come on, unsure of problem as everything seems fine, any help appreciated

It doesn't have one. Go to https://www.youtube.com/watch?v=HCcmL8hLcDY to diagnose check engine light problem

look for over flow tank,there is your cap

your air conditioning unit has a gas cannister which eventually runs out. You will need to get this re-filled. Check ou yellow pages or on line for air conditioning services. Prices vary.

if lights on dash are going out its the battery need 12v plus to even turn car over has this been happening since cold weather as mine does the same but only in winter summer its fine

I was tolod the plug is on the passenger side on the firewall according to the manual the Autozoner tech looked at .He couldn't find it either when he looked for it. So where is it???

its the brake swich 25 bucks trust me god bless

Hi there its easy, first remove the radiator cap,
then you will need to remove the engine cover under the car held in by 8mm screws, then on the bottom of the radiator you will see a red plug, unscrew the plug with a flat head phillps screwdriver and coolant will start to drain, when it stops, reinstall everything in the reverse order and fill with new coolant!
Happy Motoring

try disconecting negative battery terminal for a few seconds

find the fuse for the alarm and pull it out then try to start it.

Most likely a gas cap or emissions issue, if you are sure the car is running fine. But you will have to have it scanned to know for sure.