I have had my 05 Cayenne S for a little over a month now. I bought it Certified pre-owned from a Porsche dealer with 33000 miles. I am noticing that when I have the interior lights on, they dim up and down with the engine running. Is this normal??? Doesn't seem like it to me, but I figured I ask you guys who know these vehicles better.

 

It's not normal, seems like a problem with the alternator... Have it checked

 

get it looked at.

should be covered under their warranty.

good luck.

J

 

Today its not doing it?????????

 

Sounds like there is a possible electrical issue here...

This is something which would happen if you pulled your neg battery terminal from the battery after starting the vehicle...

Have it checked under the service contract it can be checked. If you were local I'd have no problem plugging it in to see if there were any issues pending....

No service lights huh? Hummm

-Eli