Just a little something I was sent from my local stealership when enquiring about a totaly diferent problem..... still it might be handy for some one...
Bosch ignition ECUs types 0227 100 023 and 0227 100 042 fitted to many 1980's Mercedes models suffer common failure with loss of spark as main symptom.
ECU is fitted in engine compartment and is a rectangular cast alloy box approx. 10cm deep by 8cm across by 4.5cm high with 3 mounting screws. It has 2 circular connectors (1 pin and 4 pins). Cause of failure appears to be deposits of dissimilar metal corrosion building up on (alloy) base of ECU where it is mounted on steel. This reduces ability of ECU to dissipate heat and leads to premature failure of power transistor and associated components. If you own a classic, preventative maintenance should include cleaning deposits off base and remounting with thermal grease.
Just though I'd share the Knowledge.
Bosch ignition ECUs types 0227 100 023 and 0227 100 042 fitted to many 1980's Mercedes models suffer common failure with loss of spark as main symptom.
ECU is fitted in engine compartment and is a rectangular cast alloy box approx. 10cm deep by 8cm across by 4.5cm high with 3 mounting screws. It has 2 circular connectors (1 pin and 4 pins). Cause of failure appears to be deposits of dissimilar metal corrosion building up on (alloy) base of ECU where it is mounted on steel. This reduces ability of ECU to dissipate heat and leads to premature failure of power transistor and associated components. If you own a classic, preventative maintenance should include cleaning deposits off base and remounting with thermal grease.
Just though I'd share the Knowledge.
