Browse

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

What Causes the Mercedes R350 Air Conditioning to Not Cool Properly?

1 Answers

SanLyla

07/29/25 10:39pm

Refrigerant overcharge or undercharge, loose drive belt of the car's air conditioning compressor. Insufficient or low refrigerant: Observe through the sight glass on top of the dryer. During normal operation of the air conditioning, if continuous slow bubbles appear in the sight glass, it indicates insufficient refrigerant. If obvious bubble turbulence is observed, it signifies a severe refrigerant shortage. Excessive refrigerant: The proportion of refrigerant volume in the air conditioning system is strictly regulated. An excessive proportion can impair heat dissipation. Similarly, adding too much cooling oil during maintenance can also reduce the heat dissipation capacity of the refrigeration system. Observe through the sight glass on top of the dryer. If no bubbles are visible in the sight glass during operation of the car's air conditioning, and none appear after the compressor stops, it indicates an overcharge of refrigerant. If excessive pressurized cooling oil is present, somewhat turbid bubbles can be seen in the sight glass during normal system operation. Loose drive belt of the car's air conditioning compressor: Automotive cooling relies on refrigerant, which is transported by the air conditioning compressor. The drive belt is a crucial moving component that powers the compressor. If the belt is loose, the compressor may slip during operation, leading to reduced transmission efficiency, decreased compressor speed, diminished refrigerant delivery, and ultimately resulting in inadequate cooling from the car's air conditioning.

Was this review help?

4

5

Share

More Forum Discussions

Can You Wear a Hat While Driving?

You can wear a hat while driving, as there are no regulations in China's road traffic laws that prohibit wearing a hat while driving. Here is some additional information: 1. Do not make phone calls while driving: If a driver is found making or receiving phone calls, watching TV, or engaging in any other behavior that hinders safe driving while operating a motor vehicle, they will be fined between 20 and 200 yuan and receive a 2-point penalty. If you must answer a call, pull over to the side of the road and resume driving only after handling the matter. 2. Do not wear high heels, slippers, or drive barefoot: According to the Road Traffic Safety Law, drivers are not allowed to wear high heels exceeding 4 cm while operating a motor vehicle. Violators will receive a warning and a fine of 50 yuan. If an accident occurs, the fine increases to 200 yuan. Drivers who fail to maintain a safe distance or wear high heels while driving will bear full responsibility for the accident. 3. Do not wear gloves while driving: Wearing gloves can cause the steering wheel to slip, especially during sharp turns, increasing the risk of understeering and accidents. 4. Remove accessories and hanging ornaments while driving: In the event of a sudden emergency, the body may lunge forward due to inertia, and the seatbelt can exert significant pressure. Wearing hanging ornaments at this time may lead to serious injuries such as sternum fractures.

Why is there a clicking noise when the car window is rolled up to the top?

Here are the possible reasons for the clicking noise when the car window is rolled up to the top: 1. It may be caused by aging of the window seal strip. After the seal strip ages, the friction increases, resulting in the noise. In this case, the problem tends to be more noticeable in summer because the aged seal strip expands more severely after exposure to the sun, increasing friction and making the noise more pronounced. 2. It could be due to dirt in the gap between the glass and the seal strip. Particles in the dust rubbing against the glass can also produce noise. 3. The glass guide rail might be dirty. 4. The issue could be caused by a malfunctioning window lift motor.

How to Determine if a Car Has Just Been Scratched?

Here is an introduction on how to determine if a car has just been scratched: 1. Color: Fresh scratches are usually clean and bright, with a color closer to the car's original paint. Older scratches may appear darkened and have accumulated dust. 2. Texture: Feel the scratch with your hand. If it feels noticeably uneven with obvious burrs, it is likely a fresh scratch. If the scratch feels smoother, it is probably an older one. Additional Information: 1. Shallow Scratches: If the scratch is shallow, you can try polishing to remove minor surface scratches. Minor scratches can also be repaired by applying toothpaste. 2. Deep Scratches: These can only be repaired by repainting. You can purchase specialized touch-up paint kits online for repair, but DIY attempts may have issues, so it's best to visit a 4S shop for repainting.

How to Renew a Driver's License When Abroad?

Here are the methods to renew a driver's license when abroad: 1. Authorize an agent to handle the renewal: A motor vehicle driver may authorize an agent to handle license renewal, replacement, submission of physical condition certificates, extension applications, and cancellation procedures. When applying for motor vehicle driver's license services, the agent must submit their identity proof and an application form or physical condition certificate jointly signed by the driver and the agent. 2. Apply for an extension to renew the license: If a motor vehicle driver cannot complete license renewal, inspection, or submission of physical condition certificates within the specified time due to military service, traveling abroad, or other reasons, they may apply for an extension at the vehicle management office where the license was issued. The application must include a completed form, the driver's identity proof, driver's license, and proof of the reason for extension. The maximum extension period is three years. During the extension period, the driver is not permitted to operate a motor vehicle.

What is the maximum grace period for overdue vehicle annual inspection?

There is no grace period for overdue vehicle annual inspection. Conducting the inspection within the same month as the expiration date is not considered overdue, but there is no grace period for overdue inspections. Even being one day overdue constitutes a lapse in inspection. Therefore, vehicle owners should plan the inspection time in advance, and it is recommended to conduct the inspection three months ahead of time. Below is additional information: 1. Generally, if the inspection is overdue and the vehicle is checked by traffic police, three points will be deducted from the driver's license, and a fine will be imposed. 2. According to the "Mandatory Scrapping Standards for Motor Vehicles," if a vehicle fails to obtain an inspection compliance mark for three consecutive inspection cycles after the expiration of the inspection period, it will be mandatorily scrapped.

What does data restoration of automotive sheet metal mean?

Automotive sheet metal data restoration is a technical method in car repair, primarily involving the restoration of the vehicle body after a collision. Essentially, all processes except for repeated body work and decorative painting are referred to as automotive sheet metal data restoration. Here are the detailed explanations: 1. Content: Automotive sheet metal data restoration includes the analysis of body damage, measurement of the vehicle body, shaping of the sheet metal, stretching and correction, etc. 2. Detailed Explanation: Automotive sheet metal is a production and processing technique in car repair, also known as cold working. Simply put, when the vehicle body shape is damaged or deformed, the sheet metal process is required to address the issue. The repair of collision-damaged vehicles is not just simple hammering of the sheet metal, nor is the repair quality solely judged by visual inspection of the vehicle's appearance or gaps. It involves restoring the three-dimensional dimensional data of key points on the body to the state it was in when it left the factory.

Trending Ranking

What are the penalties for driving with an expired driver's license?

What is the correct way to drive downhill?

What is the reason for the car air conditioner suddenly not cooling and only blowing air?

What is the 0-100km/h acceleration time of the Golf GTI?

Which Volkswagen Touareg model comes with a rear-mounted spare tire?

Which Fuse is for the Hazard Lights?

How to Respond When the Engine Catches Fire While Driving?

How many points will be deducted for holding a child while driving in the main seat?

What to Do After Winning the Beijing License Plate Lottery?

Can the Vehicle Management Office Conduct Annual Vehicle Inspections?

More Forum Discussions

How often does a C1 driver's license require review after age 60?

What does incorrect driving posture in Subject 3 mean?

Does Driving Resistance Increase or Decrease in Rainy Weather?

What is the difference between headlights and high beams?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.