Search | heater control monovalve

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On Demand Video
$14.99

1981 to 1991 Monovalve Climate Control Electric Water Pump Upgrade Installation Instructions - On Demand Video

How to install a newer style pump in your late W123, late R107 and W126 with ACCIII automatic climate control

In this 30-minute instructional video, Kent will explain how this new pump compares to the original, what is included in the kit and why, how to make a new plugin wiring harness, demonstrate step by step how to install this pump in a late W123 and explain the differences you will face when instal

$269.00
Currently out of stock.

R107 380SL 560SL Klima Heater Control Monovalve Conversion - Free Performance Kit Included.

Replaces the original Bosch valve in the 1982 to 1989 380SL and 560SL with U.S. Automatic Climate Control System ACCIII - SOLD OUT

This is probably the very best upgrade you can make for your automatic climate control. It will switch the hot to cold or cold to hot much faster and will hold a much steadier heat at high engine speeds. 

$269.00
Currently out of stock.

Early W126 Klima Heater Control Monovalve Conversion without Heated Windshield Washer Fluid Tank

Free Performance Kit Included. For most 126 sedans and coupes 1981 through 1985. Replaces the original Bosch valve on ACCIII U.S. Automatic Climate Control cars - Limited Stock

PLEASE NOTE In stock now and ready to ship. No detailed instructions at this time, but it is not a difficult install this unit once you remove the false firewall at the back of the engine. You will be able to gain access to the monovalve and electric pump assembly.

On Demand Video
Mercedes Monovalve Installation - On Demand Video
$9.99

Monovalve Heater Control Inspection - Installation - Testing - On Demand Video Manual

Covers 1981 to 1991 W123 W107 and W126 with automatic climate control panel

If you have a 1981 to 1985 W123 300D, 300CD, 280E, 280CE, 300TD or a 1981 to 1989 W107 380SL, 560SL, or a 1981 to 1991 W126 380SE/L 300SD 500SE/L 300SDL 420SE/L 300SE/L 560SE/L 380SEC 560SEC that has automatic climate control this video manual will apply. These c

$148.50

W126 300SD Monovalve Housing, Electric Aux Pump, Bracket and Hoses - USED

Good working condition. Fits 1981 to 1985 126 300SD and 380SE / L

Good used monovalve housing and hoses as shown. One hose is missing. Electric pump runs smoothly and these are no longer available. Good pump bracket. Mono valve switch assembly and plunger is NOT INCLUDED. SEE RELATED PRODUCTS below to order separately.

$18.95

1981 to 1985 ACCIII Climate Control Performance Enhancement Kit

Must do for 1981 to 1985 W123, W126 and R107 with automatic climate control. You won't believe what you find under your dash!!!

The parts in this little kit will do two things.  1. Protect your climate control push button panel. 2. The system will get more accurate readings from the climate control sensor on top of your dash.

$26.40

Late R107, Late W123 and All W126 Heater Mono Valve Repair Kit

A torn diaphragm in the heater control monovalve is the number one reason for sporadic cabin heat, but it is not the only reason! With Kent's video tips, it is easy to install.

This fits the U.S. models with automatic climate control which include the 1982 to 1989 R107 380SL, 500SL, and 560SL + the 1982 to 1985 W123 ALL models + the 1981 to 1991 W126 sedan and coupes. This is an easy fix that you can do yourself.

$12.75

Late W123 Bosch Electric Auxiliary Water Pump BYPASS Kit

If the electric pump is not working and you don't want to replace it. GET IT OUT of your system!

Since the original style Bosch electric water pumps are no longer available NEW. If you need a replacement pump, you have three options. 1. Buy a used pump. 2. Buy our newer pump conversion upgrade. 3. Take your inoperable pump out of the system.

On Demand Video
$18.99

How to Install the Klima Heater Control Valve in the late W123 and the 380SL - On Demand Video

Since this really is a "plug and play" unit, it is very easy to install. No modifications at all are needed!

In this instructional video, Kent demonstrates how easy it is to install the Klima heater control valve ( monovalve replacement ). If you have one of these popular and classic Mercedes, this is the best upgrade you can make for your climate control.

On Demand Video
$12.99

1982 to 1991 107 123 126 Mono Valve Repair Kit Installation - On Demand Video

Easy DIY job to fix the most common problem with erratic cabin heat inside your old Benz.

Learn how to install this critical repair kit correctly and how to test your monovalve function on the bench. In this 13-minute video, Kent shares how to install the kit while avoiding problems. Get your cabin heat working properly again!