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Mercedes-Benz Relay (A/C System) - KAE 3701140

Mercedes-Benz OE: 0025451805

Relay (A/C System) 3701140 Main Image
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SKU: 3701140
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Relay (A/C System) by KAE

Relay (A/C System) by KAE

The job of a relay is just as it's name implies. It relays power to the various electrical systems in your car. It allows high power switches to be located remotely, often in the engine bay. The controls for this switches can then be located in the cabin or from various computer systems throughout the car using low voltage/amperage. Many relays are multipurpose, which means that the same relay can be use in different positions. When one goes bad, you can lose all electrical power to the specific systems the relay controls, and should be checked alongside fuses when such a symptom occurs. A common way to tell if a relay is working is to listen for an audible click, as it switches power on and off.

Mercedes-Benz OE No.
Current No.: 0025451805® carries an extensive catalog of aftermarket, OEM, original, and genuine parts from over 200 manufacturers. We are also constantly updating our KAE parts selection to give you the best possible selection of parts.

If there is anything you cannot find in our catalog please call® at (800) 467-9769 and our knowledgeable customer service team will help you locate the part you need, fast.

Country of Manufacture: Germany
Manufacture Quality: OEM
Shipping Weight (lbs): 0.220

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About KAE

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KAE proudly provides electronically and mechanically tested products from their German production lines, tested on the bench and in production cars on the German. KAE has been a long time supplier of
automotive parts, especially for German and Scandinavian cars, providing relay and control equipment, fan controllers, air mass meters and valve bodies as well as alternator regulators and ignition modules.

The Kaehler Automotive-Equipment company (KAE) was established in November of 1991 by Mr. Dieter Kaehler. 1998 Kaehler Automotive-Equipment GmbH was formed from the sole proprietorship with a refined focus on relays and control devices for motor. The KAE company attributes its success to the constant development and production of needed relays and control equipment based on market demand and in compliance with applicable standards, laws and regulations.

If this is not the exact Relay (A/C System) you are looking for, or you would like this part in a brand other than KAE, please call us at (800) 467-9769 and one of our customer service experts will help you locate the exact part you need.

Vehicle Fitment & Notes

Click a year range, make, and model below for additional information.

+ Mercedes-Benz 420SEL 1986-1991

+ Mercedes-Benz 560SEC 1986-1991

+ Mercedes-Benz 560SEL 1986-1991

+ Mercedes-Benz 560SL 1986-1989

Warranty® is pleased to offer a one (1) year warranty on all parts. Your Relay (A/C System) may be exchanged if it is defective within 365 days of your purchase date. Defective parts are only eligible for an exchange or store credit. No cash refunds will be issued for previously installed parts.

After one (1) year® will honor any extended manufacturer warranties. No exchange will be offered outside of the manufacturer's warranty process. Parts covered by the manufacturer warranty need to be exchanged through the manufacturer and may take up to 4-6 weeks.

If you would like to initiate a warranty claim or have questions about the process, please call us at (800) 467-9769 and a knowledgeable customer service expert will assist you.

Delivery & Returns

Delivery Info® proudly offers FREE shipping available on most orders. Some weight and size restriction apply. We also provide inexpensive and guaranteed 3 day, 2 day, and Overnight shipping options, so if you need your Relay (A/C System) tomorrow,® can deliver!

Every® order is fast, reliable, and track-able, meaning you'll know exactly where your Relay (A/C System) is at every step of the delivery process.® also displays your Expected Ship Date and transit time in your Cart, making our entire shipping process simple and transparent.

Every order consisting of all "In Stock" parts received before 5 PM ET Monday – Friday will ship the same business day. Every order consisting of all "In Stock" parts received after 5 PM Monday – Friday will ship the next business day.® stocks and ships all of our parts from our warehouse in Windsor, CT. Do not be fooled by drop shippers that claim to have everything and then hit you with three delivery charges. All of our parts come in the same box quickly and via your chosen delivery method and carrier. That's the® stock and ship advantage.

Returns Info® proudly offers a ninety (90) day cash return for all items purchased through®. The item must be new and in its original manufacturer packaging to be eligible for a cash refund.

If you would like to return an item or have questions about the process, please call us at (800) 467-9769 and one of our customer service experts will be happy to help.