Just traded the p reg A4 1.9Tdi 90hp for this and have found that there is no switch to alter the DIS display on the end of the right hand stalk (wiper controls). Handbook says it should be there, every Audi and VW i have had has had one. Are we missing something or has someone fitted the wrong bit? Goes like s**t off a hot shovel (wife's description not mine). Anyone know what the Superchip figures are?