posted before as leak was from reverse light switch and dripping on exhaust causing smoke through engine bay,
now the speedo sensor is leaking oil causing more smoke from bulkhead part of car so into the garage again to have fixed
posted this because ive seen a couple on here with same problem smoking so may be of some use.
all this from a 165 mph dash so advice these have weak points so dont do it !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!