Hi, guys I am new to this forum despite owning my RoomsterPD3 for 8 years now.... It's been a great family car apart from the odd electrical issues with the front windows. Windows are sorted but I am  having  problems with the passenger front door not unlocking. This tends to happen more  often now.  Sometimes 50% of the time. If I keep working the unlock button from inside and pull the inside handle is sorts itself out, but it's only a matter of time before it stops working altogether and I am stuck with a locked door!  I have checked the wiring harness than goes into both front doors and replaced the drivers harness, as a  clip on the boot for the multiplug connector broke and allowed water into the contacts.   

Also the rear parking sensors do not work in cold weather and  work most of the time when its warm. I am starting to think it's a body control ECU fault that may be causing both problems. Does anyone know where it can be found?

I want to take it off, check the contacts and if they seem ok I will get it tested.

Thanks

Sticking door locks some of the time, are usually gunged rather than failed cables and connectors.   Open the door find a tiny access hole and squirt with WD40

 

There have been number of cases of electric problems on older roomsters, there are threads where people have found the cables and connectors degrade and bought new door wiring looms which have fixed all the problems.  From memory they come from a parts company in Germany 

 

 

If they are genuine parking sensors they are not connected to the central electrics control module or the central door locking module (you don’t have a combined BCM on this model year). Park assist has its own module, that can be interrogated by diagnostics such as VCDS (as can the CDL).