I wanted to install a car warmer in the P5. We looked under the hood and there wasn't much to use (only one rubber gromet) It was tough, but the install was successfull. We did not have to drill in to the firewall.

The only bad thing is the extension cord is not in an ideal location. It is placed under the hood above the driver's headlight. This can be tucked back under the hood for summer.

We had to cut the head off the factory block heater cord, and replace with a new head. All in all it is fine and works!!

Anyone else installed a car warmer yet.