have had similiar probs over the last couple of days. in my case the battery holder was broken away from the circuit board (on two keys ) IanD soldered them back on.both working fine now. i was quoted £70 per key.
i believe the solonoid is the motor that drives the door lock mechanism. i,m sure somebody more knowledgeable will put me right, if i,m wrong. i paid £30 for a s/h a new one probably not a lot more.
according to the dash display the most mpg,s i,m getting is 29. have in the past had f/c,s 64 & 96 but theyr,e no longer present. its not due for a service yet. any ideas why its so low. its a manual g/box.
i,m changing the condenser because i,ve noticed mine is perished, ian d pointed out a small leak from a top up valve. however using one of those diy jobbies the gauge was showing some gas in the system. on a warm day the a/c is not quite cold.
i had the same prob vibration around 80mph. a mechanic renewed a wheel bearing but didn,t cure it.turned out to be a bush somewhere on the rear suspension..