Read the whole document. The pages I noted apply specifically to 210 and show the central buss connect5ion location X30/7. This is where the individual pairs connect and then are connected by another pair to the front SAM. From the front SAM the connection goes to the EIS (electronic ignition switch) which is the gateway to the powertraing CAN (CAN C). The CAN is a network similar to a network in your office connecting multiple computers. It is just wires with some specific voltage protocols.

The PSE might need version coding I don't remember, but it won't hurt anything to install it even if it needs coding. Warrantee on the part should apply no matter who installs it, although some folk make exception on electronic parts.

In order to evaluate the system the proper way is to enter actual values in the diagnostic program DAS for the EIS. In actual values or maybe activations the status of teh CAN B will be reported and which modules are reporting. If all that is missing is PSE then probably just PSE is the problem. If the whole CAN B is down then no modules would be reporting, windows wouldn't work, seats wouldn't work, etc. At that point one then unplugs modules (starting with PSE in this case) till the CAN B is stable and all modules are reporting.

So before proceeding I would pull the PSE and check that the functions of the other modules are intact. Other modules include DCMs (door control modules), ESAs (seat modules) LCM (lower cont module - the window switch grouping), upper control panel (sunroof and switchs) and maybe others. I think they are listed at least by numer on that diagram in the document on page 48 (I think).

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician