New Rear Bumper Sensor Upper Coding B Switch A2319059900 for Mercedes S W222

Precision Component: Upper Coding B Switch for W222 Rear Bumper Sensors

The Rear Bumper Sensor Upper Coding B Switch A2319059900 represents an essential electronic module for the Mercedes-Benz S-Class W222 parking assistance system. This genuine coding switch communicates directly with the PDC (Park Distance Control) control unit. Furthermore, it provides the necessary signal coding for the upper rear bumper sensors. Consequently, when this module fails, you will typically notice intermittent parking sensor warnings or complete rear PDC malfunction. Fortunately, replacing the faulty coding B switch restores full functionality without any complicated reprogramming.

At Mercedes-Coding.com, we specialize in OEM-grade electronic components for Mercedes models. Therefore, we fully test each A2319059900 unit before shipping. Additionally, this switch integrates seamlessly with both standard Parktronic and the optional rear-view camera system. Unlike aftermarket alternatives, our genuine coding B switch maintains original signal accuracy and voltage stability. For instance, you will experience the same precise obstacle detection as from the factory. Because of this, we strongly recommend using only OEM or OEM-quality parts for your W222.

Installing the upper coding B switch typically requires removing the rear bumper cover. Nevertheless, a skilled DIYer can complete the job in under 90 minutes using basic tools. Meanwhile, professional mechanics often finish within 45 minutes. The process involves disconnecting the old module, cleaning the connector contacts, and then plugging in the new A2319059900 switch. After installation, no additional coding or scan tool initialization is necessary. However, we always suggest clearing any existing fault codes with a Mercedes-specific diagnostic scanner, such as XENTRY or an advanced OBD tool.

Why Your Mercedes S-Class W222 Needs This Upper Coding B Switch

First of all, the coding B switch acts as an intelligent interface between the rear bumper sensors and the main PDC processor. Over time, exposure to moisture, temperature cycles, or minor impacts can degrade internal electronics. Consequently, you may see “Parktronic Inoperative” on your instrument cluster or hear continuous beeping. In many cases, individual sensors still work, but the coding switch fails to relay the correct data. Hence, replacing the A2319059900 resolves the issue without replacing all four rear sensors.

Moreover, ignoring a faulty coding B switch can lead to increased stress on the PDC control unit. Additionally, your rear camera may still show an image, but distance alerts become unreliable. For safer maneuvering and to preserve your car’s resale value, prompt replacement is highly recommended. Because we know Mercedes owners demand perfection, we stock only brand-new units. Therefore, you won’t receive a used or salvaged switch that might fail again after six months.

Another advantage of the genuine A2319059900 is its plug-and-play design. In other words, you simply remove the old switch and install the new one. Thereafter, your parking sensors will function exactly as designed by Mercedes engineers. Many online sellers offer cheap substitutes, but those often cause false triggering or signal delay. To avoid such frustration, choose our professionally sourced part with a full warranty.

Step-by-Step Installation Overview (Informational & Transactional)

Firstly, safely lift the rear of the vehicle and remove the rear bumper cover according to W222 workshop procedures. Secondly, locate the upper coding B switch attached to the inner side of the bumper. Thirdly, disconnect the wiring harness by pressing the release tab. Next, compare the old part with the new A2319059900 to verify identical connectors. After that, plug in the new module securely. Finally, reinstall the bumper and test the parking sensors by engaging reverse gear. Usually, the system will immediately produce normal audible tones and display proper distance bars on the central screen.

For those without garage access, we strongly recommend professional installation. However, if you perform the swap yourself, always disconnect the vehicle’s battery before unplugging any sensors. This precaution prevents any voltage spikes. After reconnecting the battery, perform a quick function test. In rare cases, you might need to clear residual fault codes via a scanner. Our support team can guide you through that process if necessary.

Compatibility & Vehicle List (W222 / C217 / A217)

• Mercedes-Benz S 350 BlueTEC / S 400 / S 450 / S 500 / S 560 (W222, 2014-2020)
• Mercedes-Maybach S 560 / S 650 (W222)
• S-Class Coupe C217 (S 500, S 63 AMG, S 65 AMG)
• S-Class Convertible A217 (all trims with Parktronic)
• Also fits some late W222 facelift models (2018-2020) – confirm original part A2319059900.

Before ordering, please verify your original part number by removing the old module or checking with a diagnostic tool. Alternatively, send us your VIN, and we will confirm compatibility within 4 hours.

Why Buy From Mercedes-Coding.com?

As a specialized web administrator and Mercedes aftermarket expert, our mission centers on providing authentic, pre-tested electronics. You will benefit from our technical knowledge that goes beyond simple reselling. In addition, every order includes free email support for installation questions. For instance, we have successfully helped over 1,200 W222 owners restore their parking systems. Because we value long-term relationships, we never compromise on part quality. Ultimately, the A2319059900 offers the most direct solution to rear PDC faults, ensuring your Mercedes remains safe and convenient in tight parking situations.

To summarize, the New Rear Bumper Sensor Upper Coding B Switch A2319059900 delivers OEM fit, instant compatibility, and long-lasting durability. Click the order button above, provide your shipping details, and we will dispatch the part within 24 hours. Your W222 S-Class deserves genuine components – trust our expertise to keep it performing at its best.