<
Time to clean the EGR pipe, one of the "most likely To Do" tasks on the list I made when I got the car.
>>



Don't assume EGR tube blockage until you have tested it. There are several other EGR faults on 104s that will bring u a code 5. Along with a Factory TSB part up-grade for EGR code. I will post a basic EGR flow test , if you are interested in diagnosing the fault before you go for a tube blockage repair.
Or go for the possible blockage and see if that solves it ..and if not, then repost you have the CE/code 5 again ant then you can do the flow test.