some taxi services that ran W124 in Germany would not shut off the engines for days, not even between refuelling.

They were shut off when they were pulled into the bay for inspection and service.

These are very solid cars - I enjoy driving mine (infact now that it rides so good my wife sneaks away with it)

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)