Megajolt ECUs for Mercedes engines

If your engine isn't listed below then please contact us.

Complete Megajolt bundle for Mercedes M102 engines


Bundle contains:

  • Megajolt ECU
  • New coil pack and connector
  • New crank sensor and connector
  • Refurbished EDIS Ignition module
  • Universal crank sensor bracket
  • Coil pack bracket
  • Loom kit
  • Univeral 36-1 trigger wheel
  • Set of 8mm silicone spark plug leads (except "Cosworth" which instead includes spark plug lead adaptors)
  • Complete with software and mapping cable to allow you to tune the system and maps for a wide range of engines

USB-serial adaptors

USB-serial adaptor for computers lacking a serial port.

Many new laptops and PCs do not come with a serial port.  These adaptors plug into a USB socket and allow you to connect up to your ECU. 

Many cheaper adaptors give problems, these adaptors use a premium chipset and tested to work with Megajolt, Megasquirt and Emerald ECUs.

Hard cut rev limiter

Hard cut rev limiter board for Megajolt systems
The Megajolt ECU includes an ignition retard rev limiter as standard.  The hard cut module works with the existing soft rev-limit and fits inside the ECU case.  When installed the soft-limit of the ECU automatically retards ignition timing to zero degrees 100 RPM before the hard limit activation point. This makes for a progressive application as you reach the rev limit.

Tacho Driver

Tacho driver module for coil-driven rev counters
Suitable for Megasquirt, Megajolt and many other ECUs the tacho driver allows you to retain your existing coil driven rev counter.  If you have a more modern rev counter accepts the 5 volt output of most ECUs then you do not need one of these.


Individual coil per cylinder

2-input tacho driver

4-cylinder engines

2-cylinder engines

3-input tacho driver

6-cylinder engines

3-cylinder engines

4-input tacho driver

8-cylinder engines

4-cylinder engines



Please note that some rev counters can be particularly difficult and may require additional tweaks to work correctly.