Electric Window Closing Problems

[lindowkid]

I've recently had problems with the electric drivers window on my w107 SL,1987 the window judders on the way up and stops about 3 inches from the top until I give it a wiggle and unjam it in some way. Anyone have any advice ?

Its been slow for about 6 months and got marginally better when I replaced the battery in Dec.
Andy

 

[simon j paynter]

3 possible probs

1 poor lubrication of the window carriage rollers and mechanism
2 worn out motor/ motor brushes
3 "dry" or dirty contacts on the switch ie insufficient current is being conducted across the switch contacts ( I had this problem on my 4matic seat adjuster switch the contacts were badly burnt and dirty , a good voltage could be measured across the switch with a meter, but only a very low current in amps could be metered- once cleaned problem sorted)

rgds Simon

 

[Spike]

I suggest you take the door card off and have a look to see if you can find the cause.

Check that the glass is still sitting correctly in the runners front and rear and that both the runners & other moving parts are greased up nicely and there are no obstructions or damage to the mechanism.

If all the above checks out ok then its new motor time.

 

[lindowkid]

Blimey take the door off ? Not being the lucky owner of a garage this sounds time consuming so will need some planning. I noticed the window doesn't seem to be aligned when up and the seals have damaged so it migh be an alignment issue - can you not just take off the interior facia and get access ?

 

[Spike]

Door CARD..... not the door :lol:

 

[maldon]

I too have windows that work very slowly - the drivers rear window has recently stopped altogether - although the motor can be heard running.

How should I go about removing the door cards and the interia in the rear of my '78 W107 450SLC ?

 

[jaques2k]

If the window judders on the way up and/or doesnt work very well (doesn´t close fully though the motor is heard running), it might well be the cogs on the window lifting mechanism or on the motor that´s worn out. This can however be easily fixed if you get to the cog-bar inside the door and get the mechanism out. Just weld on the worn cogs (in my case they were about 6 or 7) with a gas-welder and file them down to original shape and viola - new window lifiting mechanism - smooth as ever! I´ve done this myself doubting at first it would work, but it has now worked over 6-7 months so... Good luck!