The Mercedes FSM specifies using one for the w123... so if they have the correct equipment I would have no problem with them using it...

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

Last time I had an alignment done was at Speedy Muffler here in Canada. They used a spreader bar. The Hunter machine instruction tells them to use it. They didn't have one, so made one up from some pieces of pipe and hose clamps! Crude, but seemed effective.

That was about 4 years ago. No problem with alignment or tire wear with Kumho tires I put on. They still have quite a few years life left on them.

By the way, I was able to watch them do the alignment from the waiting room that had glass wall to shop.

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5