This Mercedes C180 came in because the aircon was not cold. Our technician found one of the aircon pipes leaking. Once the part was in, we replaced the pipe with new O-rings. The next day, the owner told us the aircon was blowing hot air in 35-degree weather. The following morning it seemed to work, but it cut out in strong direct sun, so the owner brought the car back and we checked it again.
Job completed: September 2026
| Car | Mercedes-Benz C180 |
|---|---|
| Symptom | Aircon not cold |
| Fault found | One aircon pipe leaking |
| Repair done | Leaking aircon pipe replaced with new O-rings. When the aircon blew hot air the next day and then cut out in 35-degree sun, we checked the car again. |
| Parts | Replacement aircon pipe with new O-rings |
| Time taken | Timeline confirmed when you book |
| Cost | Quoted after diagnosis |
| Warranty | 1-year workmanship warranty on the repair |
The owner booked in a Mercedes-Benz C180 because the aircon was not cold. In Singapore's heat and humidity, a weak aircon is not a minor problem. It makes driving uncomfortable within minutes and leaves the cabin stuffy and hot.
The owner asked us to repair the aircon only, with no servicing. Nothing had been done to the aircon since the owner bought the car.
The Mercedes-Benz C180 is a popular compact executive saloon. Its aircon system circulates refrigerant through a network of hoses and pipes connecting the compressor, condenser and evaporator. The rubber hoses in the system are flexible sections that absorb vibration and allow for engine movement. They are sealed at each end with aluminium fittings, crimped into place.
Over time the rubber degrades, especially in Singapore's heat. When a hose fails, the system loses refrigerant and the aircon stops cooling.
Our technician checked the aircon and found one of the aircon pipes leaking. We sent the owner a video and advised replacing that pipe.
We were still waiting for our supplier to confirm the part, so we offered to top up the aircon gas first, and the owner agreed. We then quoted the pipe with new O-rings, plus labour, and the owner booked the car back in for the replacement.
Rubber degrades over time, especially in Singapore's climate. The aircon system on any car runs under pressure and cycles refrigerant continuously whenever the aircon is switched on. In a hot, humid country where aircon runs almost every trip, the hoses work hard.
The aluminium end fittings are crimped onto the rubber hose. As the rubber ages it loses flexibility and can crack or harden at the joint where the fitting meets the hose. Vibration from the engine accelerates this. A small leak in one hose will slowly deplete the refrigerant until the system stops working altogether.
Hose wear like this is normal over the life of a car. It is not caused by anything an owner does wrong, and it is a straightforward repair when caught and addressed properly.
When the car came back in, we replaced the leaking aircon pipe and fitted new O-rings. The car was ready for collection, and the owner left a favourable Google review.
The next day, the owner told us the aircon was blowing hot air again in 35-degree weather. The following morning it seemed to work, but it cut out in strong direct sun. The owner brought the car back that morning and our team checked it again. Afterwards, the owner updated the Google review and thanked our team.
From our team's record of this job. Number plates are pixelated.
The cost of replacing aircon hoses on a Mercedes C180 depends on which pipes have failed and the extent of the work. We inspect the system, confirm exactly which components need replacing, and give a clear quote before any work begins.
On this job, we quoted the leaking pipe with new O-rings, plus labour, before the owner booked the replacement.
Have the aircon system checked as part of your regular servicing. A visual inspection of the hoses and fittings can spot early signs of cracking or seeping before a full failure.
If the aircon is noticeably less cold than usual, if it takes longer to cool the cabin, or if there is a faint oily smell near the aircon, get it looked at early. A small hose leak caught early is a simple repair. Left until the system fully depressurises, the compressor can also be damaged from running without adequate refrigerant.
This Mercedes-Benz C180 (Car aircon pipe replacement) was handled at 1 Car Service, an independent workshop in Sin Ming AutoCity, Singapore. For Mercedes-Benz, we use dealer-level XENTRY diagnostics. The work is backed by our 1-year warranty. We hold a 4.9★ rating from 1,836+ Google reviews.
WhatsApp us your car model and the symptom. We inspect the aircon system, find the root cause, and quote clearly before any work begins. Aircon repairs like this one carry a 1-year warranty.
Cost depends on which components have failed. For aircon pipe replacement the price covers the parts and labour for the specific hoses that need replacing. We inspect first and quote clearly before any work begins. WhatsApp us your car model and symptom for an honest estimate.
Very high temperatures put an aircon system under heavy load, and a system can cut out to protect itself. It can also point to a fault. On this C180, the aircon blew hot air the day after the pipe replacement, then cut out in 35-degree direct sun, so we checked the car again. If your aircon stops in extreme heat, it is worth having the system inspected and pressures checked.
We inspect the system visually for signs of oil residue or staining at the hose connections, and check the system pressure. A low or dropping pressure reading points to a leak somewhere in the circuit. On this C180, our technician found one aircon pipe leaking. We sent the owner a video, then a quote before replacing the pipe.
We use XENTRY, the Mercedes-Benz dealer-level diagnostic system, for fault code reading and system checks on Mercedes vehicles. For aircon diagnosis we combine electronic scanning with a physical pressure check and visual inspection to get a complete picture of the system.
Chat with a specialist on WhatsApp
Point your phone camera here to chat with us instantly.
Or open WhatsApp Web →Prefer to save our number?
