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. You may have to drain about a gallon of coolant out of your radiator before removing the valve. A sharp-angled tool is included to help you remove the old parts from the valve. In Kent's video instructions, he will show you how to remove the valve from a W123 ( valve locations are in slightly different locations on the R107 and the W126), take it apart, install the new parts correctly, and assemble it back together into the car.
Product Details
Here is the complete assembly removed from the plastic housing on the firewall. This part is the same on all related models but location along the firewall can vary. A 1983 W123 300D is shown here. The diaphragm Kent is pointing to is completely torn.
The unit can be tested on the bench with 12-volt power. Kent will demonstrate that in his video instructions.
The kit includes a new diaphragm assembly, a spring washer, new clips, and spacers. a sharp pick tool and detailed instructions on how to do this yourself.
Related Products:
1981 to 1991 Monovalve Climate Control Electric Water Pump Upgrade
Since the original style Bosch electric pumps are no longer available, Kent decided to come up with a good alternative.
1981 to 1985 ACCIII Climate Control Performance Enhancement Kit
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.
Late W123 Bosch Electric Auxiliary Water Pump BYPASS Kit
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.