Manny,
I could not recall whether I had zapped the CE light before or after I cleaned the MAF, so I decided to ZAP the pending codes and start again.

So far, no more pending codes but still a few flashing icons - need to drive a few more miles to clear these.

No matter what, I have not had a CE light since I cleaned the MAF (prior to cleaning it came on within 15-20km). This is what happened before and it lasted 3 months. So, cleaning DOES seem to work, even if not for long term. Not worthwhile for the pros unless Bosch gives them a method and equipment. However for DIY, why pay $300 if all it needs is a clean! Bad design anyway - Bosch website shows a new design that separates particles and droplets.!!!

BTW - I found some ultrasonic cleaning baths on eBay - meant for jewelery, Dentures, etc! I think they use water. Cost is only about $29.00. If my light comes back on, I might try one of these and then wash in alcohol afterwards to make sure no water is left. Maybesomeone else would like to try this first