From the MA State Emissions/Inspections site, I learned they're at 31 New Salem St., Wakefield (781) 246-0959. I've found some similar comments about John's, and am hoping they hold true - taking my new-to-me '95 E320 wagon up there for some service tomorrow. I'll post results when I pick up the car later this week. Maybe if I offer to build them a Web site (since I couldn't find one) so people find them, they'll give me a discount.