Could you please define what you mean by "cheap" spring compressor? What to avoid, what to buy? How are MB springs different? I am only asking in anticipation of having ot do this job in the future and would like to know for then. Thanks!

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman