Where would the temp sensor be? Per the dealer, he has to take aprt dash to
get to evaporator. I can tell you the driver side doesn't get cold- only
passenger side.. that, gets just cool...
The dealer did put a dye into the freon last service, and was unable to find
a leak anywhere...that he could get to anyway!
Sounds like an incompetent dealer. Take it to another MB dealer. Evaporator
never go bad... the reason is it is in protected area where you can't
accidently smash it.
MB did have evaporator problem but only on W140 big older S class but they
learned their lesson and was a manufacture defect. I have not heard problem
on W210 yet.
The sensor is located on the driver side under the dash near the center dash
area. You can't take it out without evacuating the A/C system of freon... MB
dealer has that proprietary diagnostic computer to check what is wrong with
The evaporator sensor problem is usually accompanied by a "locked" EC
mode... that you can't turn of... red lite on EC button is always on.
Driver side and passenger side has it's own temperature setting...
In any case, do not let them rob you of your precious money.
My 1997 SL500 has the problem that the EC light is always on... Dealer says
leaky evaporator. I added freon along with oil and the AC cools OK until the
freon slowly leaks out. I press the EC button for ten seconds to make the EC
light go out and the compressor to come on..
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