After building a code reader and testing the SRS system, I get a #2 error code that according to the codes tells me that the control unit is bad. I want to verify with someone in the know before I commit to buying a new/used part. It is my belief that the control unit the error code is referring to is the sensor located behind the climate control unit in the dash. My original unit shows part #003 820 73 10. That part has been replaced by part #004 820 17 20 and then by part #000 820 68 26 according to the EPC. The EPC also shows a condenser (energy reserve) and a voltage transformer electrical unit that look like they are located somewhere behind the driver's door. I guess one could possibly call these control units too. There is an error code for voltage supply which I would guess may refer to a bad voltage transformer. I see no error code that would lead me to the condenser.

Can someone please verify for me that error code #2, control unit, refers to the part behind the climate control unit like I think it does? I don't want to throw money away at a part I don't really need.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
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'99 E300 turbo 227,500 miles
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'15 Smart electric coupe 28,000 miles