replacment gear box of old BMC amby

[amby68]

hello i hav an old BMC ambulance that has a mercedes engine&box, i think it came out of a 207, but i dont know. i am looking for a replacment gear box or a exploded view so i can see if i can fix it my self.i have lost 4th gear, it still go's in but has no drive. i heard no noise wen it went and it still runs ok in outher gears. the id plate on the gearbox says
"Mercedes benz AG"
BENZ G1/18-5/4.7
Aggr.nr/le 711.113
forti-nr 383398
i am having probs finding the engine number, all i can find
in the engine casting is 601 011 14 01 - 24e 91 and on the sump is R601 014 10 02
can you help identify wot model it may hav come out of, or know of any one who can?
thankyou

 

[C220GJS]

Hi and welcome,
If you have a look in here; http://www.detali.ru/cat/oem_mb0.asp?TP=3 ; you may be able to identify some of the part nos. you need.