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" Q: What is the easiest way to replace HID bulbs in my 2007 Infiniti G35X? The headlights rotate right to left with steering. Do I have to take off my front bumper and remove the whole headlight assembly? A: Ok, do you have HID bulbs, or do you have the standard xenon bulbs? The optional HID bulbs should never need replacing for the life of the vehicle. Which is good, because they&amp;#039;re really expensive. This is important because replacing the xenons is easy. It&amp;#039;s so easy there&amp;#039;s no procedure. The normal xenon bulbs are not even worthy of a replacement procedure in the manual, so the process must be pretty simple... There&amp;#039;s a rubber or plastic boot on the back of the headlight assembly, inside the engine compartment. The wires that energize the bulb go through the middle of it. Unscrew it from the housing, and there&amp;#039;s your bulb. Install the new bulb(s) without touching them with your hand. The oils in your fingerprints will crack the bulb when it heats up. Use clean cotton gloves or a hanky to install the bulb in its socket, and reinstall the gasket/bulb socket assembly. The warranty book says it should take less than a half-hour, and that includes enough time for the mechanic to walk out into the parking lot, get the car into the shop, change the bulbs and drive the car back to the lot. Q: In February 2006, I purchased a new Mercedes 2006 E350W. I have returned the car to the dealership six times complaining of a hard shifting into first gear and the occasional failure of the transmission to shift out of first gear after start up. Updated software was added during each of the first four visits for service. During the fifth visit,a new valve body was installed with updated software. That valve body was replaced with a newer version with updated software during the sixth visit. I drove out of the dealership&amp;#039;s parking lot after the sixth visit and the transmission immediately hung in first gear. So I have now returned the car for the seventh time with no evident resolution of my problems in sight. I have noticed on the internet that other owners of the same model and year are experiencing the same problems. Is there something that the dealership is overlooking? They say that they find no code on the on-board computer that evidences the malfunctions.  A: I haven&amp;#039;t seen any buzz on the internet about your specific problem, but you may have spent more time on it. It&amp;#039;s time for you to start making Lemon Law noises. Basically, the dealer has a reasonable number of attempts and a certain number of days (which varies from state to state, your mileage may vary) to repair anything covered by the warranty. If he can&amp;#039;t or won&amp;#039;t, you can force him to replace the vehicle with a comparable one, or buy it back. Trust me, neither you or the dealer will be happy is this process goes to arbitration, which is usually how it&amp;#039;s resolved. The dealer is entitled to a reasonable sum for any use you&amp;#039;ve had of the vehicle. This usually takes the form of a cost per mile, and it ain&amp;#039;t cheap. At this point, I&amp;#039;d start squawking for a new transmission under warranty. If they won&amp;#039;t go for that, you don&amp;#039;t need to write back to me, you need an attorney. Q: I have a 1967 Chevy Nova SS that I rarely drive, but I do start it up once in a while. Last week after starting it in the garage to let it run for a while, I noticed the fuel gauge went from a 1/4 tank, which is correct, to clear across the gauge and pegged beyond the full mark and remains there even when the ignition is turned off. Can you tell me where I might start looking for the problem -- sending unit, ground or open in the hot lead? A: Judging by the age of the car, I&amp;#039;d guess it&amp;#039;s the sender. I don&amp;#039;t even have a schematic for anything that old handy. Get out the voltmeter and start chasing it down. Q: How can I renew my sandblasted headlight lenses? Winter highway driving has caused a poor view in the nightime, because of reduced headlight shine. A: Funny you should ask...I wrote How To Polish Your Headlights Like A Pro for my March 2008 Saturday Mechanic column. Q: I&amp;#039;ve only driven my 2004 Camry 1500 miles in 4 months. I use Pennzoil synthetic oil. Is this a good brand of synthetic? Should I be changing the oil at a time interval rather than at 3,000 miles? Will the oil hold up for 6 to 8 months without being changed? I take the car out on the highway for about a half hour and run the AC once a week. A: Some quick answers for you: Yes to all three questions. And taking that half-hour ride weekly is the best thing you can do for this car.  "^^<http://www.w3.org/2001/XMLSchema#string>
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