Tip & How-To about Audi A4

Diagnose your Audi or VW Check-Engine light on your own

If you have an Audi or VW, and have ever had to take it to a dealership for work, you know how expensive it is. When your check-engine light comes on, you're looking at an hour's labor just for the five minutes it takes them to scan the computer and find the fault code(s). That's up to $126 for a five minute scan that doesn't even fix your problem.

Forget that - you can do it yourself if you have a laptop computer. Go to www.ross-tech.com and download the factory diagnostic software (called VAGCom, for VW/Audi Group Communicator) to your laptop. The shareware version is free of charge, and will work for scanning fault codes that are set by the check-engine light, turning off airbag warning lights, ABS failure warnings, and some other tweaking and tuning (you can enable your key fob to open and close the windows and sunroof, delete the horn beep when you arm the alarm, or set the locks to lock the doors automatically at 15 mph and unlock when the key is removed, just to name a few). For the more serious home mechanic, you can buy the unlocked "real deal" version for $100. For most people, the shared free version is more than enough for your needs.

The only other item you need is an interface cable. This can be purchased on eBay for about $20. You need an OBD2 to USB diagnostic cable, readily available on eBay. Mine has worked without a hiccup for over three years, so don't worry about longevity on the cable.

Once you have this stuff, you're ready to go - plug the cable into your laptop, into the OBD2 port on your car, start VAGCom, and follow the on-screen instructions. It's very much worthwhile for anyone who owns a VW or an Audi, as many of the issues you come across can be taken care of at home, yourself, without paying hundreds of dollars to a dealership.

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what type of antifreeze for a 2006 audi a6 quattro? Low coolant light came on and then went off, sometimes after i turn off the car a little liquid drops out but not a huge puddle, so maybe a little leak, but would like to know what type of antifreeze and where to buy,autozone hopefully?


Audi cars use a special coolant called G12. It's not compatible with the typical green coolants you'll find at an auto parts store. You'll need to buy it at an Audi or VW dealership, or you can order it from www.germanautoparts.com, www.ecstuning.com, www.blauparts.com, or www.purems.com (I've bought from all four of these companies, and they're all top-notch). It's not terribly expensive, although it does run more than a typical coolant (I paid about $20 for a gallon of it at a dealership a few months ago).

FYI, the power steering fluid and the brake fluid in an Audi are also proprietary fluids, so if you go to order coolant, you may want to order a bottle of each of those as well to keep on hand.

Aug 02, 2010 | 2006 Audi A6

1 Answer

rough idle when wet


Go to your local parts store, buy a Di-Electric grease. It's not expensive. Pull each plug wire off one at a time. Take a screwdriver or something to stick inside the boot of the wire. Put this grease inside the plug wires on both ends, and also around any other wire you see that have a potential of getting wet. The keeps out moisture and really works. I did a friends VW this way and the VW dealership couldn't figure out what was wrong so this shuld help the problem.

Jun 25, 2010 | 2004 Mazda 6

2 Answers

type of oil for audi tt 01


The best oil for that engine is mobile1 0w-40 european car oil, that is what the dealerships will use.

Depending on what temperatures you will be operating in you can also use a 5w-30 or a 10-w30.

Always use a fully synthetic oil in the Audi 1.8t, they have lots of sludge problems due to the turbo overheating the oil and breaking it down.

Sep 19, 2009 | 2001 Audi TT

1 Answer

01 audi tt quattro cruise controle stopped working


You own an Audi, everything is expensive. If your cruise light doesn't come on at all, you have an electrical problem. If the light comes on, you have an actuator problem, or a vacuum problem. The dealer, or a shop that works on Audi's should be able to find the problem.

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1 Answer

A6 engine ''deep rattling'' noise


go to scottykilmer.com - i use this guy a lot - you just have to sign in - first name only! or whatever you want to call yourself. it is 100 percent free and he is an expert on all cars - you can expect an answer within an hour or so! this guy knows more than one person should know - trust me - no fee for free info? cant go wrong

Jan 03, 2009 | 2004 Audi A6

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