The right solution begins with the right measurement.

XENTRY Diagnosis Kit 4 is the professional Mercedes-Benz diagnostic system for comprehensive testing, maintenance and repair. It combines the XENTRY Diagnosis Pad, the XENTRY Diagnosis VCI communication interface and the manufacturer's diagnostic software.

Unlike a generic scan tool, XENTRY provides vehicle-specific test procedures, actual and specified values, guided diagnostic routines, actuator tests, adaptations, teach-in processes and control unit commissioning. This allows a fault to be assessed in the context of the vehicle's complete system architecture rather than as an isolated code.

Official online functions are used where the procedure and vehicle require them, including supported SCN coding, software updates and programming. Availability always depends on the exact model, equipment specification and the Mercedes-Benz systems applicable to the vehicle.

How it supports accurate diagnosis

• Vehicle identification by VIN and individual equipment specification.
• Quick Test of installed control units and stored events.
• Evaluation of actual values, specified values and environmental data.
• Guided tests and component actuation where provided by the diagnostic procedure.
• Adaptation, teach-in and commissioning functions for applicable components.
• Documentation of the diagnostic result before and after repair.

A fault code shows that a control unit has detected a deviation, but it does not always identify the underlying cause. An automotive PicoScope allows electrical and electronic systems to be observed while they are operating.

Waveform shape, amplitude, frequency and timing can be evaluated for sensors, actuators, power supplies, grounds, control signals, charging systems and communication networks. This may reveal a brief interruption, unstable supply, timing deviation or distorted signal even when no permanent code is present.

Several signals can be captured at the same time and compared with one another or with suitable reference waveforms. This is particularly valuable for intermittent faults and for cases in which standard scan-tool data alone cannot support a reliable conclusion.

PicoScope does not replace XENTRY. The systems complement each other: XENTRY reports what the vehicle has detected; the oscilloscope shows what is physically happening in the electrical circuit.

What can be measured

• Sensor and actuator signals.
• Power supplies, grounds and voltage drop.
• Current draw and control pulses.
• Communication networks and signal integrity.
• Timing relationships between components.
• Intermittent interruptions and short-lived deviations.

ServiceMB uses a TEXA KONFORT 720 TOUCH station configured for R1234yf. The equipment automates the main service stages and monitors the relevant quantities throughout the process.

The station can recover and recycle the refrigerant, separate the recovered compressor oil, evacuate the system and recharge the specified quantity of R1234yf. Oil and UV tracer are managed by the equipment where the service procedure requires them.

Vacuum-phase monitoring may indicate certain leaks, but it is not a substitute for dedicated leak detection when refrigerant loss is suspected. In that case, the cause must be investigated separately before the system is finally charged.

The station can record the operations performed, providing traceability of the procedure and refrigerant quantity.

TEXA TXR ID—analysis before service

Before connecting the service station, we use the TEXA TXR ID portable refrigerant analyser. It identifies whether the vehicle contains R134a or R1234yf and checks the purity of the refrigerant.

If the refrigerant is incorrect or contaminated, it is not admitted into the station's normal service circuit. This initial check helps prevent mixing of refrigerants and protects both the vehicle system and the service equipment from contamination.

Why a controlled procedure matters

An air-conditioning system must operate with the specified refrigerant quantity and suitable compressor oil. An incorrect quantity can reduce cooling performance and affect compressor operation. For that reason, ServiceMB does not simply ‘top up’ the system; the work is based on recovery, measurement, evacuation and charging to the technical data for the vehicle.

Principal stages

• Identification and purity check of the refrigerant.
• Recovery and recycling of R1234yf.
• Separation and measurement of recovered oil.
• System evacuation and monitoring of the vacuum phase.
• Metering of oil and UV tracer where required.
• Charging the exact specified quantity of R1234yf.
• Saving a service report.