Benzowner64

Dear Group,

MB 1997 S600

I have an original 1997 S600 with no previous AC problems or repairs.

After starting and driving ~.5mi, a whining sound that varied with RPM began within the engine compartment. I stop and turned off the engine. Upon restart, the sound was not present, but the EC Light on the climate control panel was on. Pressing the button will not turn the light off. The light has remained on through multiple driving cycles. The belt is intact.

Question: It is obvious that MB has built some diagnostics into the EC Light. It is not being allowed to be switched off because some other fault condition is being detected. Do you know what the fault conditions are or where I can find them?

Thank you in advance for your help.

Jim

mys50095

check the rear fuse box and go to anti-lock fuse and check if is bad some times that happens the EC LIGHT come on and the climate go to the off and on position

cool_lagoon

number what fuse is it on the rear fuse box?

skorupa

It's just low on freon. Trust me.
There is a diagnostic available, one temp set to low the other to hi, etc. which you can find by searching but low freon is by far the most common cause.