Probably not a major problem, but there is a little more involved in the S/S circuit is appears....
Taken form the OBD11 Mk7 FL forum as I was preparing to do some mods...
The Battery monitor control module (it's called J367)would need to do nothing else but SS. This is not the case!
J367 is involved in measuring the battery condition for a host of other purposes including providing data to the car for the calculation for the alternator charging profile - which changes with age, usage and condition. The car stores the complete battery history - meaning that it monitors every ampere that either leaves the battery, or is injected into the battery (i.e. by the alternator, or by the recuperation system). This data is used over the life cycle for the battery to optimize its longevity. It's J367 that is does much of the data provision for this data and disconnecting the module WILL impact battery life-alas.