1983 Mercedes 300D Poor Acceleration

1930 MERCEDES BENZ
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NWDY06
  • MEMBER
  • 1 POST
'83 Mercedes 300D, Turbo, 165,000miles. Two issues.

1. Poor acceleration: Car accelerates very slowly. It will take about 25-35 seconds to accelerate from 0-55mph, a definite problem on the freeway. Just slow to accelerate on flats and especially uphill. Okay for now on downhill. I have to shift down to second, sometimes low, if the hill is above a slight grade and then it crawls along. The car has yet to not make it up a hill but I haven't driven on a longer stretch of hill yet.

2. Slow shift: Car will stay at about 25mph for 10-15 seconds before shifting into next gear. Doesn't seem to have problems shifting at other speeds.

I just had the car serviced where the mechanic 'tweaked' something to address the poor shifting which seemed to correlate timewise with the onset of the poor acceleration issue.

Thanks for all advice.
Apr 25, 2006 at 9:21 AM
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DR LOOT
  • ✓Experienced Mechanic
  • 2,311 POSTS
I'm having a hard time with your story? either your mechanic adjusted the kick down cable, or he messed around with the Accelerator linkage (not very smart), whatever he did he screwed it up, take it back to him, and tell him to do a right.
Mar 3, 2009 at 3:54 PM

Suggested Repair

Return the car to the mechanic and have the kickdown cable and accelerator linkage checked and correctly adjusted.

Conversation Summary

The owner of a 1983 Mercedes 300D turbo reports very slow acceleration, especially uphill, and a delayed shift around 25 mph. The issues began after a mechanic adjusted something related to shifting. The expert suspects the kickdown cable or accelerator linkage was adjusted incorrectly and advises taking the car back so the mechanic can correct it.

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