E51 Bike Rack

E40 trailer plug socket, seven-pin
mb-telephone (cellular) with console and card (с 26.06.1997)

E51 bicycle rack, alustyle (double) (с 1978)
short-range interference suppression

G48 five-speed transmission (с 1978)

Maybe the bike rack is what actually provides the radio suppression, forms some sort of RF barrier :lol:

Yes, :lol:

Some codes can mean something different depending on the model. For instance, E40 in a G means "trailer plug socket, seven-pin" and not "mb-telephone (cellular) with console and card (с 26.06.1997)"

It's just the way it is, I guess :wink:

Is that why I have bad radio reception then?

The other thing I think that on Gs specific code combinations often mean something other than the obvious specified by the individual codes. At one point there was a website which explained all these codes combinations. But I can't find it anymore.

Wout, was your G not originally ordered by the German BGS (BundesGrenzSchutz)?. If so, it's not surprising that it was fitted with E51, given the radio that the car must have been factory fitted.

"E51 bicycle rack, alustyle (double) (с 1978)
short-range interference suppression ",

means that in the earlier models E51 there was a short range interference surpression and on the later models E51 means a bicycle rack.
I don't know on what date or model the change was.

IMEHO (in my even humbler opinion :lol: ) that has all logic but applied to the whole Mercedes vehicles range, i.e. it is entirely possible that for some modern Mercedes code E51 means bicycle rack, alustyle (double) but given that the G-Wagen has been produced since 1978 in makes no sense whatsoever that E51 could mean anything else than short-range interference suppression, as your own G proves.

Mortinson
Yes , mine was an ex BGS vehicle that was factory fitted with a short wave radio. I have seen several other 460 models that had the short wave radio and all had the E51 option.
I think your right for the second part. A bicycle rack alustyle does not make any sense for a 1979 G.
I have a small book with a lot of option numbers for Mercedes G and I found a number (U40) that has three different meanings

"U40 interior monitoring mirror (с 09.05.1996по 25.09.1996)
cargo net behind front seats (с 26.09.1996)
seat cover in single-colored imitation leather (mb-tex) "

My 280GE has the imitation leather seat covers (MB tex) but I do not know to what type of car the other two options belong, or why there is no other number for these two other options.
Mayby someone else?

wkr
Wout

Are u flirting, "lovely engine bay indeed"