I have used a Karcher power washer for years. I agree that if used carefully it can be a real time saver. But one should never use it to "blast off" crud or dirt or tar as that will lead to damage to the paint. What it is truly superb for is cleaning wheels. I have had great success with a wheel cleaner like P21 or even Simple Green on the wheels, followed by the power washer -- at a distance.

__________________
Alan Weinschel
2001 S500 Capri Blue
2004 E320 4matic Wagon Tectite
1992 300TE 4matic Black Pearl
2000 BMW 540ia Anthracite