I just got a 1979 w123 300D with 187,000 miles. I noticed that a squeaking sound intermittantly seems to be coming from the drivers' side rear wheel. It is a high pitched sound that sounds like it is rotating. It could just be a bad brake pad, but the brakes don't squeal when applied. Any ideas? thanks!

Dragging pad? Maybe? Stuck caliper?

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83 SD

84 CD

Tire squealing from the massive diesel power?

Wheel Bearings?

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

There is a sheet metal dust cover on the rear of the rotor that could be touching the rotor as rotating. The rubber brake hose could be restricting brake fluid flow back when brakes are released causing the pads to lightly drag on the rotor. The parking brake shoes are misadjusted, too tight? causing the shoe to rub within the rotor. 3 possibilities.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.

well theres one way to test the parking break squeel, engage the parking brake while the car is in motion, if it goes away Bingo.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.