Model | 447 with engine 274, 651 |
with code HH4 (THERMOTRONIC automatic climate control) | |
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear) | |
Model | 447 with engine 274, 651 |
with code HH9 (Air conditioner, automatic heater control) | |
with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear) | |
Model | 448 |
S83.30-4622-09
1 | Screw | 3 | Screw | |
2 | Screw | 4 | Refrigerant line |
Danger ! | Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures | Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | |
Danger ! | Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts | Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. | |
| Protect air conditioning circuit and components from moisture when carrying out repair work | ||
| Notes on handling refrigerant R1234yf | ||
| Notes on handling refrigerant R134a | ||
| Remove/install | ||
1 | Drain air conditioning system |
| |
Model 447 with code HX1 (R-1234yf refrigerant) | |||
2 | Remove expansion reservoir and swivel out of working area with attached coolant hoses | Model 447 with engine 274, model 448 | |
Do not extract coolant. | |||
3 | Remove bolt (1) | Threaded connection, refrigerant line to refrigerant line | |
4 | Remove refrigerant line (4) from connecting point | ||
| Compressor oils (specification 362.1) | ||
Installation: Replace sealing rings and moisten with compressor fluid. | |||
5 | Seal refrigerant line (4) and connection at connecting point using stop plugs | Record plug | |
6 | Raise vehicle | ||
7 | Unscrew bolt (2) | Bolt, refrigerant line on refrigerant compressor | |
8 | Remove refrigerant line (4) from refrigerant compressor | ||
| Compressor oils (specification 362.1) | ||
Installation: Replace sealing ring and moisten with compressor oil. | |||
9 | Seal refrigerant line (4) and connection on refrigerant compressor with stop plugs | Record plug | |
10 | Remove lower engine compartment paneling | ||
11 | Unscrew bolt (3) | Threaded connection, refrigerant line to refrigerant line | |
12 | Remove refrigerant line (4) from connecting point | ||
| Compressor oils (specification 362.1) | ||
Installation: Replace sealing rings and moisten with compressor fluid. | |||
13 | Seal refrigerant line (4) and connection at connecting point using stop plugs | Record plug | |
14 | Lower vehicle | ||
15 | Remove refrigerant line (4) | ||
16 | Install in the reverse order |
129 589 00 91 00
Record plug