In these cases the problem is usually that the rollers at the bottom of the door have started to rub against the track.
Sharan sliding door problems.
We live on a killer of a hill and the manual doors would take your arm off.
Whilst doing that get someone to press the unlock button and see if you can t get it to unlock.
Remove the speaker if you havnt already done so and then pull and push the wiring loom where it exits into the rubber.
Other items required for car doors may be the check strap or the inner panel or trim.
First vacuum loose debris so you can see what you re working with.
The first time it wouldn t open or close and they claimed they reset the onboard computer.
Next take a dry stiff scrub brush and work through corner to corner.
Most sliding doors have a mechanism called an adjusting screw located at the bottom of the door ends.
If the cable is not greased often and the wheel lowered they end up seizing.
The cable has been pulled almost all the way in and the door locks so it cannot go to where the cable can reach.
It occurs if the spare wheel mechanism is not serviced regularly.
The rollers at the top can also wear down lowering the bottom of the door so that it rubs on the track.
Sliding door tracks are magnets for dirt dust pet hair bugs grass food crumbs you name it.
The door locks can and do fail but the wiring into the door is significantly more likely to be the culprit.
There may also be problems with the front door regulator motor.
Volkswagen sharan door sliding door complete 7n drivers side rear 2011 2018.
This problem is common on the sharan.
If the problem is not corrected the door and frame may be damaged.
The cable to the sliding door on my sharan 7n from 2014 has jumped off the little tap and it cannot be put back on.
Among the common functional or sliding door problems are the damage to the materials rotten wood and deformation of the metal.
It is difficult to open and close a door if the hinges are damaged or improperly installed.
All of these items can become damaged through lots of use.
I queried when buying the car whether they would cope on a steep hill but was told there would be no problem.