The iCarsoft CR Max P is positioned as the larger, newer successor to the CR MAX platform, with a 10-inch screen, wireless diagnostics, CAN-FD and DoIP support. Daves Discoveries put it in a Mercedes-Benz GLC X253 and skipped the feature-list theater: identify the vehicle, scan every responding module, open a stored transmission entry, inspect climate data and check what the TPMS menu can actually do.
Watch the Mercedes GLC test
The video runs for 11 minutes and 52 seconds. The presenter first shows the case and accessories, then connects the wireless VCI and works through the GLC diagnostic menus.
What changed: a larger tablet and standard DoIP hardware
The supplied case contains the tablet, wireless VCI, charging hardware, an Ethernet cable, an F-chassis lead and a USB-to-Ethernet adapter. Those network accessories matter because DoIP moves supported diagnostic traffic over Ethernet rather than the older CAN-only path used by many vehicles.
The current U.S. listing specifies a 10-inch 1280 x 800 touchscreen, 64 GB storage and a 10,000 mAh battery. It also lists CAN-FD and DoIP support, 58 vehicle makes, 50 service functions and lifetime free Wi-Fi updates. These are platform capabilities, not a promise that every control unit exposes every function.
| Connection or feature | What the video shows | Important limit |
|---|---|---|
| Wireless VCI | The GLC session connects through the Bluetooth diagnostic adapter | Wireless convenience does not mean every scan is instant |
| DoIP kit | Network cables and adapters are included in the case | The GLC session does not show DoIP negotiation |
| Service menu | Many reset, adaptation and calibration categories are visible | Coverage changes by vehicle and ECU |
| Free updates | An update notification is visible on the tablet | Updates depend on continued product support and available software packages |
Vehicle identification on the GLC X253
After selecting Mercedes-Benz, the scanner reads the VIN and identifies the platform as GLC X253, model 909, diesel. Automatic identification removes several opportunities for a manual selection error, but the decoded result should still be checked against the vehicle before running tests or resets.
The presenter notes that the wireless route can be slower than a direct cable. That is a fair trade-off to consider. A cable may reduce connection overhead, while the VCI lets the tablet move around the workshop and avoids a lead across the cabin.
What the full-system scan found
The auto scan walks through the control units supported for this vehicle. A modern Mercedes can contain a long list of modules, so the scan takes time. The result page shows responding systems and flags the transmission control module with a stored entry.
Inside the transmission module, the presenter describes a stored, non-current communication event involving the gearbox and parking brake. That distinction matters. A historic communication code can be left by a brief voltage drop, a lost data packet or a past repair. It should be saved, checked for current status and retested before anyone condemns a module.
The transmission menus also expose functions related to oil-level checking and torque-converter lock-up testing. The presence of a menu item is not permission to run it without the Mercedes procedure. Vehicle temperature, road speed, battery support and workshop safety can all be part of the required conditions.
Climate-control live data is the most useful quiet moment
The strongest diagnostic example is not a warning light. It is the climate-control data list. The presenter opens refrigerant information and reports roughly 6 bar with the engine not running. That number is only meaningful with ambient temperature, system state and the correct Mercedes specification, but the workflow is sound: look at the data before replacing a pressure sensor or compressor.
This is where a full-system tablet earns its place over a generic engine reader. It can enter a body or comfort module, view values in the system that owns them and compare the scan result with physical measurements. It still cannot decide whether a pressure reading is plausible without the test conditions.
The TPMS screen also shows a real limitation
The service menu reaches the Mercedes tire-pressure system. On this car, the available function asks for sensor identification numbers. The CR Max P does not trigger or read the tire sensors over RF in the video. If replacement sensor IDs are printed on the parts, they can be recorded before installation and entered in their correct wheel positions. Otherwise, a separate TPMS tool may be needed.
Who is the CR Max P for?
Good fit
- Independent workshops working on several European, Asian and American makes
- Mercedes owners who need body, chassis and climate modules as well as engine data
- Users who expect to encounter CAN-FD or DoIP vehicles
- Technicians who value a large standalone screen and wireless movement around the car
- Buyers who prefer lifetime updates without an annual subscription
Probably more than you need
- You only read generic check-engine codes
- You need an external TPMS sensor trigger built into the tablet
- You expect every service icon to work on every vehicle
- You need factory programming or guided diagnostics that require OEM tooling
Final verdict
This no-nonsense test is useful because it shows ordinary diagnostic work. The CR Max P identifies the GLC, completes a broad module scan, opens a stored transmission event and reaches live data outside the powertrain. It also exposes a TPMS function without pretending to be a sensor trigger.
The DoIP upgrade is real at the hardware level, but it is not the connection used in this session. Buyers should separate future-ready protocol support from the functions demonstrated on one vehicle.
Bottom line: For multi-system Mercedes work and a mixed-make garage, the CR Max P offers substantially more reach than a basic OBD2 reader. Confirm the exact vehicle function you need, and use the tablet as part of a documented diagnostic process.
Review the live price, vehicle coverage, included DoIP hardware and update policy.
View iCarsoft CR Max PFrequently asked questions
Was DoIP used on the Mercedes GLC in this video?
No DoIP connection is shown. The kit and platform support are discussed, but the diagnostic session uses the wireless VCI.
What fault did the scan find?
The presenter opens a stored transmission communication event involving the gearbox and parking brake. It is described as historic rather than current. Save the exact code and verify it with Mercedes service information.
Can the CR Max P read climate-control data?
Yes, on this GLC. The video shows refrigerant pressure and other climate-module values. Interpret them under the correct operating conditions.
Can it register TPMS sensors?
The demonstrated function lets the user enter sensor IDs into the vehicle. The video does not show the CR Max P triggering sensors over RF.
Are software updates free?
The current U.S. listing states lifetime free Wi-Fi updates with no annual subscription. Check the current listing when ordering.
Does every service function work on every car?
No. Support depends on the make, model, year and installed ECU. Confirm the exact function needed for the vehicle.
Video source: Daves Discoveries, "iCarSoft CR Max P DOIP Diagnostics No nonsense review - part 1," uploaded July 8, 2026. Product specifications, price and availability were checked against the iCarsoft US listing on July 15, 2026. Vehicle and function coverage varies.
