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Car Forum / Mercedes-Benz Cars / September 20051977 Mercedes 280E Bad Shakes at 90kph
Hey guys, Hope someone might be able to point me in the right direction. Car is a 1977 280E Has been sitting for about 9 months.Engine and Autotrans runs fine. Brakes are a little rough and pulsate upon application. But the worse thing is the car gets the shakes real bad around 90kph. Seems to be worse when Accelerating hard to 90kph and then backing off really quick?? I haven't inspected under the car but I'm thinking. It's either- - Engine or transmission mounts - Uni joints - Brake rotors warped - Front end suspension bushes or loose bits? Has anyone experienced this before? Cheers Jeremy Checked alignment? If the rotors are warped, it wouldn't be a little rough under brakes, you'd be lurching everywhere IME. -mark Haven't checked the alignment yet.Good idea though! > Checked alignment? If the rotors are warped, it wouldn't be a little rough > under brakes, you'd be lurching everywhere IME. > > -mark > Hey guys, > [quoted text clipped - 6 lines] > to be worse when Accelerating hard to 90kph and then backing off really > quick?? Check the tyres. Daryl if it has been sitting for 9 months and wasn't inspected by a reasonable mechanic prior to driving like you said, then be careful! cars are great but cannot be left lying around like that without having potentially serious issues Steve >> Hey guys, >> [quoted text clipped - 12 lines] > > Daryl > Hey guys, > [quoted text clipped - 19 lines] > > Cheers Jeremy Check tyres for lumps , then balance >But the worse thing is the car gets the shakes real bad around 90kph. Seems >to be worse when Accelerating hard to 90kph and then backing off really [quoted text clipped - 10 lines] > >Has anyone experienced this before? Often... and it's usually from none of the above. Jack up each wheel in turn and check the tyres for runout... either flat spots from standing or ply separation (which will cause bulges on the tread shoulders). -- John H > Hey guys, > [quoted text clipped - 19 lines] > > Cheers Jeremy If one or more suspension ball-joints or control arm bushes or tie-rod ends are badly worn, the front end can set up an oscillation (where the whole thing moves back and forth within the slop or play) which can sometimes be stopped by a sudden wrench on the steering wheel. An unbalanced tyre (for whatever reason) can stimulate this oscillation to start, or just going over a bump. My boss had an HR which did this,..I only travelled in it once!!? Jason A badly unbalanced or defective tire / tyre ought to be considered, especially since the car stood so long. > Hey guys, > [quoted text clipped - 18 lines] > > Has anyone experienced this before? **Yep. And every time it was because the wheels required balancing. Just my experience though.  SignatureTrevor Wilson www.rageaudio.com.au Cheers for the input I'm 99% it's a broken engine or tranny mount. It seems to come on worse when giving it a bootful shiftting hard. > Hey guys, > [quoted text clipped - 20 lines] > > Cheers Jeremy |
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