Loss of R134a refrigerant
Table 1 indicates the approved coolant loss after a certain period of time. This is no leak. Refrigerant fluid may not be topped up.
Table 2 indicates how much refrigerant fluid must be topped up after an unapproved coolant loss due to a leak after a specified period of time.
Different cases:
- Loss of refrigerant per Table 1 is not exceeded
- Top up lost R134a refrigerant
- It is not permitted to top up the refrigerant fluid
- Loss of refrigerant per Table 1
is exceeded
- Top up lost R134a refrigerant
- Refrigerant fluid must be topped up additionally per Table 2
| Table 1: Number of years since last filling |
0 - 1 | 1 - 2 | 2 - 3 | 3 - 4 | 4 - 5 |
| Permissible loss [g] --> no need to top up refrigerant fluid | ≤ 30 | ≤ 60 | ≤ 90 | ≤ 120 | ≤ 150 |
| Table 2: Number of years since last filling |
R134a Coolant loss [g] | Top up quantity refrigerant fluid |
|---|---|---|
| 0 - 1 | - <120 | 0 |
| 120 - 150 | 10 | |
| >150 | 20 | |
| 1 - 2 | - <180 | 0 |
| 180 - 210 | 10 | |
| >210 | 20 | |
| 2 - 3 | - <240 | 0 |
| 240 - 270 | 10 | |
| >270 | 20 | |
| 3 - 4 | - <300 | 0 |
| 300 - 330 | 10 | |
| >330 | 20 | |
| 4 - 5 | - <360 | 10 |
| >360 | 20 |
Follow NOTES FOR OPENING AND REPLACING PARTS in refrigerant circuit.
Depending on the type of component replaced on the heating and air conditioning system, it may be necessary to top up the refrigerant fluid, even if no measurable losses have occurred during drawing off. Follow the notes provided by the heating and air conditioning system manufacturer, taking account of the tolerances (and inaccuracies) indicated in the operating instructions of the relevant service station.
Information on the required refrigerant capacity for the entire heating and air conditioning system is contained on the type plate (1) in the engine compartment.
If necessary, refer to Technical Data for CAPACITY .
Installation note:
Reseal refrigerant filler necks on vehicle with sealing caps.