I've bought a non-oem car charger off Ebay for $9 free shipping, I plugged it in my phone while driving from work, and the phone battery cover began overheating, don't buy a non-oem car charger off E-bay, went to VW store and got one for $29.99
How do you know it was 'overheating'? My OEM wall charger gets this sucker pretty darn hot. Did the phone shut down or give a warning? Did you check the battery temp?
I picked up a 4 cables and a car adapter from Monoprice for less than I spent on lunch and I have no complaints...
Oh I have missed one point, the red indicator was not on, and I noticed it 20 minutes after, the back of the phone was extremely hot, did not shut down or gave any warnings though