when the car is still it blows heat, when driving the a/c works fine. there is a loud ticking under the hood when the a/c is on. locally no one will look at it, i'm about 100 miles from merc dealar.

any advice.
Brian

__________________
Brian
1999 CLK430

This sounds like the AUX cooling fans are not running = A/C head pressure and temperature rise above safe levels = safety switches turn off the compressor until pressure/temperature drops = more air flow with the car moving.



Have a great day.

__________________
ASE Master Mechanic
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Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
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Fleet Durability
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