Check engine code P1494???manufacture control auxiliary emission control

error codes climate control 230,235 and 241 on a 1999 320s mercedes

that code is manufacturer auxiliary control emissions control

My list says code 1407 is no flow for the EGR valve.
You might want to check the valve and the sensor.

Well it's not a p0 code which indicates a generic trouble code, this is a code p1448 which is a manufacturers specific code, and your stands for a bad manufacturer controlled auxiliary emissions controlled component. Try checking your charcoal canister which filters fuel vapors from your gas tank, there is an evap vent control valve which can get stuck in position. You can replace that valve or try cleaning it with some carb cleaner and then using a small screwdriver to free the plunger up. Your check engine light will go off after a couple drive cycles without a fault or you can reset it iwth a code scanner.

p1494 code indicates a fault was detected in the LDP (leak detection pump) that is part of the EVAP system. You most likely have a defective pump switch. This area of the emission system can sometimes be very difficult to diagnose, but usually the fault can be corrected by replacing the switch.

DTC P1406 IS EGR VALVE PINTLE POSITION CIRCUIT MALFUNCTION CONDITIONS.POSSIBLE CAUSE EGR SOLENOID CONTROL CIRCUIT IS OPEN SHORTED TO GROUND OR TO B+ -CHECK EGR VALVE FUSE - OR THE EGR VALVE AND PCM HAS FAILED.

what you want to do is take it to nissan and scan it with the consult2 diagnostic system to tell you which of the many things in the system have failed.
the EGR is the most common.

P1494 Leak detection pump pressure or mechanical fault, hope this helps

THIS IS THE VENT CONTROL VALVE. HOPE THIS HELPS. GOOD LUCK

P0455 IS AUXILIARY EMISSION CONTROL
P1631 IS MANUFACTURE CONTROL AUXILIARY INPUTS AUXILIARY OUTPUTS