Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.
Included for free with this service
Online Booking
Mechanic comes to you
12-month / 12k-mile warranty
Free 50 point safety inspection
Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.
On average, the cost for a Mercedes-Benz S420 Car AC Compressor Relay Replacement is $133 with $28 for parts and $105 for labor. Prices may vary depending on your location.
| Car | Service | Estimate | Shop/Dealer Price |
|---|---|---|---|
| 1995 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$180.13 | Shop/Dealer Price$208.62 - $261.00 |
| 1997 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$160.13 | Shop/Dealer Price$188.65 - $241.05 |
| 1999 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$160.13 | Shop/Dealer Price$188.65 - $241.05 |
| 1998 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$160.13 | Shop/Dealer Price$188.61 - $240.98 |
| 1994 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$160.13 | Shop/Dealer Price$188.67 - $241.10 |
| 1996 Mercedes-Benz S420V8-4.2L | Service typeCar AC Compressor Relay Replacement | Estimate$160.13 | Shop/Dealer Price$188.65 - $241.05 |
In order to operate, your air conditioning system needs to compress refrigerant to pressurize it. The compressor is both electronic and belt-driven. The AC compressor relay controls the supply of electricity.
The AC compressor relay acts as a control, turning the compressor on and off when necessary. It may be located close to the compressor (under the battery tray, for instance), but it may also be located in the under-hood fuse box, or somewhere else depending on the make and model in question. However, like all other relays, this one is subject to wear and tear, and eventual failure over time.
The AC compressor relay is an integral part of the system. Without an operable relay, electricity cannot be sent to the compressor, and it will not function despite having a good belt, good clutch and other components. If your compressor does not function, have one of our expert mechanics diagnose the system and replace the AC compressor relay if required.
Having a functional AC compressor relay is essential to air conditioner operation. While the blower motor will still circulate air in the cabin, that air will not be cold because the compressor isn’t pressurizing refrigerant. This isn’t critical for vehicle operation, but it does affect driver and passenger comfort and the ability to clear foggy windows. If the AC compressor relay has been diagnosed as faulty, have it replaced as soon as you can.
Fast and easy service at your home or office
Backed by 12-month, 12.000-mile guarantee
Real customer reviews from Mercedes-Benz owners like you.
Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.
