A/C problem(97' E320)
 

A/C not blowing cold at all(warm/heat O.K.),EC light is on all the time.I bought this car last year,until last week A/C system was fine.Any recommendation?Thank you in advance.

Do a thorough search in the "tech help" forum and you will find many threads about a/c issues that apply to your car. Especially, look for info on using the climate control to display real time A/C system readings. These are VERY helpful for troubleshooting.
Dan

Here ya go - http://www.peachparts.com/shopforum/tech-help/86110-210-chassis-climate-control-problem.html, Had the same problem. Check out the second page especially.

Len