Mercedes-Benz Truck CPC3 / CPC4 / CPC5 Control Unit – Repair & Cloning (Actros, Atego, Arocs)
Assessment fee deducted from an approved repair. Repair is not included in the assessment price.
Feedback from garages and vehicle owners
Supported ECU data transfer, with compatibility checked first.
CPC vehicle control unit for Mercedes-Benz Actros, Atego and Arocs trucks (CPC3, CPC3 EVO, CPC4, CPC5). The CPC links the engine, gearbox and dashboard, so when it fails the truck often will not start or drive. We repair your own unit, clone it to a replacement, or come to the truck by arrangement.
Common faults
- Truck will not start or will not select a gear
- No communication with the CPC on the diagnostic tool
- Cruise control, PTO or speed limiter not working
- Several warning lights at once after a jump start or welding
- Replacement CPC fitted but parameters missing
A fault code alone does not prove the unit has failed: supply, earths, CAN wiring and connectors can cause the same symptoms. Send the codes on WhatsApp before ordering.
Services
| Service | How it works |
|---|---|
| Bench assessment by post | We test the unit and send a written quote. The fee is deducted if you go ahead. |
| Repair | Repair of your own CPC, tested before return. |
| Cloning | Your data and parameters transferred to a replacement unit. |
| On-site visit | Swap and programming at the truck, quoted per job and location. |
Before you send it
- Check batteries, supply fuses and earths.
- Read and save all fault codes.
- Send a photo of the label on WhatsApp so we can confirm the version.
VEHICLE FITMENT
Compatibility guideVehicle lists are identification guidance, not a fitment guarantee. Send the complete part number and hardware revision for confirmation before ordering. A similar-looking unit is not proof of compatibility.
How the service works
Warranty included
Choose your service
- 12-month warranty on repairs
- Tracked UK return included
- No VAT added
- Written report with every unit
- Not repairable? Refund less the bench test
Shipping & drop-off
Post the unit to our lab in Rainworth, Nottinghamshire, or drop it in by appointment. Pack it in an anti-static bag with the fault codes and your VIN – see packing instructions. Tracked UK return is included in every price; turnaround is confirmed when the unit arrives.
Fitting in Mansfield
Fitting options are done by appointment at our Mansfield workshop: removal, refit, fault code clear, adaptations and road test. Book after ordering on WhatsApp or by email.
Questions
Repair, cloning or replacement – which do I need?
If your unit has a repairable fault, repair keeps your original and needs no programming. If it is damaged but readable, cloning to a matching used unit is usually cheapest. If it cannot be read or repaired, we quote a replacement with your data transferred where possible.
Will the car need coding after the work?
Not after a repair or a successful clone – the immobiliser and coding come from your original data. Some units need adaptations reset after fitting.
Does a fault code prove the unit is faulty?
No. Supply, earths, wiring, sensors and actuators can set the same codes. That is why every unit is tested first and you get a written report.
What if my unit is not faulty?
You pay only the bench test and receive the report to show your garage.
Do you remove immobilisers or emissions equipment?
No.
Not sure of the part number?
Send a photo of the label on WhatsApp or by email before ordering and we confirm the right service.
