Hot air coming out left window vent with air conditioner on

SOURCE: Air Conditioner

did u vaccum the system

John Weathers

• 409 Answers
• Posted on Dec 30, 2008

SOURCE: Air Conditioner for Benz 1998 E320

Check system for codes;

Displaying & Reading Trouble Codes (DTC Memory)
Air Conditioning (A/C) 

Models 208 as of MY 1998

Diagnostic trouble Code Memory [15] 

Note: 

• The A/C pushbutton control module (N22) has DTC memory and data output. The diagnostic trouble codes and data are displayed via the temperature display window. The stored DTC's will remain in memory even with the vehicle battery disconnected.
• The DTC memory differentiates between current and intermittent faults.
• Numerous DTC's can also be read with the Hand-Held Tester (HHT).

Preparations for DTC Readout 

1. Review 11, 12, 13, 14, 15, 21, 22, 31, 31, 41
2. Ignition: ON
3. Temperature selector: left: "HI"; right: "LO"
4. Ignition: OFF
5. Ignition: ON
6. Within 20 seconds press REST and EC simultaneously for more than 5 seconds.
7. The LED in Recirculated Air flashes and the display shows "d1A".
8. Press AUTO repeatedly until all DTC's are displayed. Record each DTC as it is displayed.
9. Each fault (short circuit, open circuit) is assigned a DTC. Thus in the left display: "E1" appears, and the right display indicates the DTC. The current faults (refer to table) are displayed first, next, the intermittant failures (e.g. 45 °5) are displayed in the display window next to the FAN symbol. By pressing the right AUTO the next DTC is displayed.
10. To erase: Can only be performed after all faults have been readout. Press left AUTO and right AUTO buttons simultaneously for more than 2 seconds and the display shows: left: "d" and right: "FF". To cancel erase: By pressing the left AUTO button, the current faults will appear again.
11. Select a base temperature setting.
12. Turn ignition OFF, to end test.

Note: Due to instrument cluster (IC) series interface, DTC's may be stored in IC memory, therefore readout and erase DTC's from IC memory.

SOURCE: 1986 Mercedes 300e The air conditioner vents blow

All the blend doors and vents are controlled by vauum. If you look in the rear firewall behind the brake master cylinder you will see a vacuum check valve with lines entering the cabin of the vehicle. The yellow colored ones are for your central locking,the green for a/c system, and red for your heater/water valve,clear for your source. Try isolating your vac. systems by unplugging lines and capping them off. Any leak in either system can adversly affect another system. So isolate your leak and then you will have to test your actuaters in the leaky system. If you unplug the red line and cap it off-the water will stop entering your heater core.