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| Use only O-rings which are resistant to refrigerant R134a and to the corresponding refrigerant oils. The O-rings are no longer colour coded. Either black or colour-coded O-rings may now be used, without distinction. |
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| Ensure that the interior diameter of the O-rings is correct. |
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| The O-rings may only be used once. |
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| Before assembly, lubricate the O-rings slightly with refrigerant oil (PAG oil). |
Note | t
| When blowing out the parts with compressed air and nitrogen, always use an appropriate device (workshop extraction system) to suck up the mixture of gas from the parts. |
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| Once the repair work has been completed, screw plugs (with seals) into all the valve connections and service connections. |
| Putting the air-conditioner into service. Check the vehicle-specific charge quantities → Rep. gr.87. |
| Do not top up a charged refrigerant circuit; discharge refrigerant present and recharge system. |
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