Product Summary
This is a genuine factory original equipment manufacturer (OEM) Idle Air Control Valve (IAC) mounted inside its original rubber isolating bracket assembly. Produced by VDO in Germany for Mercedes-Benz passenger vehicles equipped with mechanical Bosch CIS-E fuel injection systems, this dual-hose electronic component precisely regulates the volume of auxiliary air bypass around the throttle plate to maintain smooth engine idle speed under variable thermal and electrical loads.
Condition Note
This part is in verified working condition. It was carefully unbolted from a functional vehicle, thoroughly inspected, and bench-tested to verify responsive internal rotary valve actuation and clean circuit continuity. The metal valve cylinder is physically sound with normal engine-bay surface patina and scuffs as pictured. The integrated black rubber mounting surround remains flexible and intact with its metal eyelet sleeves structurally secure. The two-pin connection layout on the base is straight and completely free of corrosion.
🚗 Vehicle Compatibility
Fits classic late-1980s Mercedes-Benz models equipped with the 4.2L M116 or 5.6L M117 V8 engines, including:
* 1986–1991 Mercedes-Benz 420SEL (W126 Chassis)
* 1986–1991 Mercedes-Benz 560SEL (W126 Chassis)
* 1986–1991 Mercedes-Benz 560SEC (C126 Coupe Chassis)
* 1986–1989 Mercedes-Benz 560SL (R107 Roadster Chassis)
⚠️ Common Problems
As these electro-mechanical valves log decades of service, internal varnish and heavy carbon sludge build-up from the crankcase ventilation system will cause the rotating internal slide valve to bind or seize completely. When this happens, owners suffer from erratic engine idle hunting (surging heavily between 500 and 1500+ RPM), sudden stalling when coming to a complete stop, or an dangerously high uncontrolled idle speed in cold weather.
🔧 The Part Fix
Installing this verified working original valve addresses erratic engine speed hunting and prevents low-RPM stalling when auxiliary accessories like the air conditioning engage. To guarantee optimum longevity, it is recommended to give the interior sliding gate a quick flush with specialized throttle body cleaner and carefully inspect your engine\'s hard rubber vacuum lines for small hidden cracks during installation.
🔢 Part & Manufacturer Identification
* Primary Stamped Mercedes-Benz OE Part Number: 000 141 22 25
* Alternate Mercedes Reference Number: A0001412225
* Integrated Rubber Mount Casting Markings: 116 141 13 82
* Component Assembly Origin Stamp: Made in Germany
