Twingo I 1999 – Engine noise – Front axle noise

Hello I need 2 tips what my twingo has for “macking”. my free workshop can’t do it. Twingo Metropolis, 6/1999, 118,000 km, 60ps/44KW, EURO2 a) Engine noises – loud chatter and ring the loudest in the cold, when without load the speed is reduced. (so if you go from the gas) The whole is loudest around the approx. 3000-3500 turns. In the warm condition it gets smaller. Ringing disappears almost completely. the speed range where this occurs becomes smaller. it bl but louder motor noises. b) at certain temperature and humidity dependencies and after about 20km slow autobahn ride (a40 in the ruhrpott) the “left front wheel” starts to squeak. it is a mechanical and metallic squeak which behaves synchronously to the wheel speed. if I briefly tap the brake it is short-term away, if the steering is only minimally moving it is also short-term away. ?????? Brake pads are still ok – ca 5-6 covering – together with brake disc n changed 2 years ago. Every time I go to the workshop with it, I have the demonstration effect that nothing squeakes. ;-(( thanks in advance for your tips tom