Suspension gremlin = end of tether

[monkeyboyuk]

Ta, I thought the rolling resistance would only be affected by the tyre depth not width. IIRC they should be 265/40/20, mines had replaced with 275/40/20. I was looking for a second set of wheels anyway as I intend at some point having these refurbed

Not sure on different codings as not really looked into that.

Ref troubleshooting, this is where I lost my rag a bit with them….. they’ve basically plugged in, not found faults, visually inspected and not found anything, test driven and not has a clue how they should drive……

Originally Posted by Ronin

Tyre width does affect the rolling resistance.
As part of the fault finding process I would try original OEM tyre/alloy sizes and compare to a known good working car with the same setup.

Additionally, just like D2 has different springs for cars with different wheels/equipment/body, different suspension codings must exist for air suspension of a D4?

What were the troubleshooting steps of the garages which attempted diagnosis?