MB STAR C4 is the professional diagnostic equipment for Mercedes Benz cars manufactured, it is the replacement of HHT. IBM Compact 4 operates based on the Windows XP system.
 
Function:
1. 1989~up to now Car, Bus, Truck, Sprint, Smart;
2. All electric system Diagnostic; (Do not include flash code);
3. Reading out and erasing trouble code; reading the real-time data of sensor and actuator; testing the components of cars; coding and programming.
 
Character:
1. Realizes all the function of official factory BENZ compact 3.
2. C4 Multiplexer can connect to factory computer and IBM laptop.
3. Complete maintenance data. It could offer full disassembly and assembly circuit diagram, working principle and element place anytime needed. It is the best assistant for maintenance man. 
 
Description:
Benz compact 4 is a latest Daimler Chrysler funcetional multiplexer. 
 
The system offers total diagnostic coverage of all engine, chassis and body systems:
Reading and re-setting of diagnostic trouble codes (DTC) 
Real-time reading of dynamic data
Full component activation clearing and re-setting of adaptation values
Coding of all engine, chassis, body and instrumentation modules
Key configuration
Procedure for fitting Mercedes- Be n z accessories through the D2B ring and MOST bus
Total ASSYST / ASSYST + control (Active Service System) to update on board service history
DAS: Concise interface and straightforward operation using a wintel computer you can realize a quick and accurate code reading and testing on the cars system.
Features:
Engines (All Gasoline & Diesel Systems) 
Transmissions and Electronic Selector Modules
Airmatic and Active Body Control Suspension Systems
Traction Systems: ESP / ASR / ETS / ABS / BAS / SBC braking systems
Supplementary Restraint Systems (SRS) / Airbag, All body modules OCP / UCP / LCP / SCM / SKF / KFB / RCM / DCM’s
Drive Authorisation System
Sam (Signal Acquisition) Modules
Electronic Ignition System (EIS) 
Pneumatic System Equipment and ATA functions
Air Conditioning / climate control Systems
Instrument Cluster
Tyre Pressure Control
Parktronic System
Keyless Go
D2b Command & Audio Gateway (D2B and MOST networks) 
TV Tuner
Headlamp Range Adjustment
Seat Electronics
Rvc, RST & Vario Roof modules
Automatic Clutch System ACS
M-Class Body Modules (AAM / EAM / DAS / SEM / VG Transfer Case)
Assyst & ASSYST + systems
Compatibility: All Merce des Be n z vehicles with OBDII