Mercedes Benz E Class Leaks & Noises Problems

Interior heater doesn't blow hot just cold. How can I fix this rather than going to the garage?

small oil leak somewhere around turbo after towing caravan all other times nothing car runs very well no smoke from exhaust.

got a rumbling noise on nearside front particularly on rough surface or even slight pothole it is a vibrating noise that you can feel and hear. took it to garage last week and they fitted a new bottom ball joint to nearside suspension but i...

car not changing gear when it should. had been told that the gearbox ecu may be the problem and was a plug and play fix but dont know where to locate it on this model. can i be sure this is the problem? , could it be hydraulic oil?

Bonnet release lever inside car does not release the bonnet. Access to the engine compartment needed urgently to top-up automatic transmision hydraulic fluid level which is leaking.