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New owner, some questions...

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Old Aug 23, 2009 | 04:23 PM
  #1  
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RowanC5
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Default New owner, some questions...

Hi guys, bought my first C5 a couple of weeks ago, a '99 Coupe. I'm about to drive it 3000 miles around Europe, including the Nurburgring and over the Alps, and before I do I want to change the oil and address a problem with the a/c:
1.The a/c won't turn on, when I press the a/c button the green led light flashes a few times then goes out and nothing happens. I've searched the forum and have found mention of this problem but no diagnosis. Is it likely the a/c simply needs re-charging or could it be something more serious?

2. What grade of oil should I be using when I do an oil and filter change?

Thanks for any help!
Rowan
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Old Aug 23, 2009 | 04:41 PM
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my a/c did the same thing, turned out to be the compressor. could also be a couple of other issues though. good luck
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Old Aug 23, 2009 | 04:59 PM
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Originally Posted by RowanC5
Hi guys, bought my first C5 a couple of weeks ago, a '99 Coupe. I'm about to drive it 3000 miles around Europe, including the Nurburgring and over the Alps, and before I do I want to change the oil and address a problem with the a/c:
1.The a/c won't turn on, when I press the a/c button the green led light flashes a few times then goes out and nothing happens. I've searched the forum and have found mention of this problem but no diagnosis. Is it likely the a/c simply needs re-charging or could it be something more serious?

2. What grade of oil should I be using when I do an oil and filter change?

Thanks for any help!
Rowan
I'd start with having the compressor checked out.
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Old Aug 23, 2009 | 04:59 PM
  #4  
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St. Jude Donor '15
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Originally Posted by RowanC5
Hi guys, bought my first C5 a couple of weeks ago, a '99 Coupe. I'm about to drive it 3000 miles around Europe, including the Nurburgring and over the Alps, and before I do I want to change the oil and address a problem with the a/c:
1.The a/c won't turn on, when I press the a/c button the green led light flashes a few times then goes out and nothing happens. I've searched the forum and have found mention of this problem but no diagnosis. Is it likely the a/c simply needs re-charging or could it be something more serious?

2. What grade of oil should I be using when I do an oil and filter change?

Thanks for any help!
Rowan
There's a procedure you can run that shows error codes for the HVAC system. Search for that then post the results.

As far as oil goes, synthetic mobil1 5-30 is what comes in them if i remember correctly. always use a high quality, synthetic oil.
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Old Aug 23, 2009 | 05:56 PM
  #5  
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How To Check DTC Codes

1) Turn on the ignition, but don't start the engine.
2) Press "Reset" button in order to clear any IPC display warning messages.
3) Press and hold "Options" and press "Fuel" 4 times within a 10 second period.
4) The computer will now scroll through all the modules, showing the error codes. Once it is done it will display "No More Codes" At any time you can scroll up and down to see each code by using the "Trip" and the "Options" buttons. Scroll to the component that has the code and press the "Gauges" button to view the code(s) numbers. To scroll through these code numbers, use the "Trip" and "Options" button again. Hold "Reset" to clear any codes. You can delete one code at time or all codes in any component.
5) Press the "E/M" button or shut off ignition key to end session
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