Join Date: May 2010
Vehicle: Slk 200K 2004 r171
Other Toys: Toyota C-HR Hybrid
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It's quite possible the previous owner had the glass replaced and didn't get the heated version then , I suppose the only way to find out , is to remove the glass and see if it is connected up !
It's probably in with the boot latch /lock , perhaps someone with a r170 will chime in ?
The rear is difficult , again perhaps someone with more knowledge on the r170 will have some ideas ?