When I took my 84 300D out to Home Depot to pick up some stuff, the brake light began to flicker. Now this was happening NOT when I was braking but when I was throttling, what could be the matter? Thanks.

Ok course, I checked my emergency brake and it was not engaged.

The red brake light tells you 2 things.
The parking brake is set
The brake fluid level of the master cylinder is low. One of your sections of the master cylinder has become low enough to turn the warning light on. OR you have a fault in the fluid level circuit.

Dave

__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car

Does the brake warning light only indicate low level (and that the E-brake's set)? I ask 'cause on my truck, the brake light can also indicate a vacuum problem...just a thought

__________________
2001 VW Jetta TDI, 5 speed, daily driver
1991 Ford F-350, work in progress
1984 Ford F-250 4x4, 6.9l turbo diesel, 5 speed manual
Previous oilburners: 1980 IH Scout, 1984 E-350, 1985 M-B 300D, 1979 M-B 300SD, 1983 M-B 300D
Spark-free since 1999

dmorrison, does the circuit become faulty if it is wet? If my fluid level is ok, then that would be the problem, somewhere in the circuitry.

If your'e brake fluid is ok, then check the two little float switches located on top of the master cylinder resovoir (spell?). You can temporarily disconnect them to see if that solves the problem. If not, something is amiss in the wiring harness or the parking brake switch up under the dash.