He's right, as MB expands its model range from 5 cars back when your W123 was new to over 30 different models in the current range. Parts for older cars that consume shelf space is being cleared for new parts.

Basic things like keys for an R129 are now NLA , trunk lock assembly for a W108 has been out of stock for some time.

Furthermore, junk suppliers like URO parts are causing quality manufacturers like Lemforder to discontinue support for older cars because consumers tend to shop only on price and would rather buy the part that's 30% cheaper even if it only has 10% of the longevity.

The days of using an old Mercedes as a reliable daily transport is numbered.

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With best regards

Al