w203 cabling from boot to dash for parking sensors

[pacemaker]

i want to retrofit rear parking sensors but need advice on how to root the cable from the main unit in the rear to top of dash
anybody done this
thanks

 

[DJNash]

Done it in my 202,

run it through boot and if you open back door u will be able to pull one corner of the seat forward enough to get a wire through then just run under carpet.

Hope this helps