my vdo dayton MS5200 is now fully connected and installed.
Pushing the local dealer resulted in the required information for the pulse output of the VSS
The location is :
- interior fuse box (my 2008 is a LHD, so the fuse box is under the steering wheel)
- the fuse box contains a BLACK 60 pin connector
- on this connector it is pin number 2 (reddish / white wire next to the pink wire)
The start/end connectorpins are neatly numbered on the backside.
Hopefully this information is of value to someone..
What you are missing are tunnels and/or other situations where the view to the gps satelites is covered / unclear / not functional.
The VSS (vehicle speed sensor) provides say 3000 pulses for every mile. Counting these pulses is much more accurate specially between high buildings, in tunnels etc. The satnav can maintain accurate position and speed even when speed is varied. Such a thing is impossible through software position tracking (i.e. pure gps satellite tracking) in these conditions.
A good vehicle-built-in satnav will do this and not just use the satellites.
(really the navigation through cities is noticeable more precise / reactive )