JensH
Senior Member
Mornin' all,
Cruise control on my car has been U/S, since I got it back in October. It is next on my list to restore to working order. I will then only have 3 main issues, apart from a list of largely cosmetic cabin and trim parts, which I'll do gradually, (1) o/s heating & A/C issues (prob. matrix), (2) underbody mechanical inspection & overhaul, and (3) bodywork, including new wings and load bay side window trims.
On the CC there is no response at all from the stalk control.
I am on the EPC so have a good idea of the exact system. My car was a pretty late model, leaving the factory on 17 November 1995 (with free factory A/C). I have a CC-specific wiring diagram and print out of drawing and part list from EPC. This thread won't therefore be too much use to owners of earlier 124s because late models have very different layouts of the CC system (see my control module below).
It is the ISC (Idle Speed Control) Type, without ASR (traction control). Confirmed direct by MB.
My understanding is that the following components are all capable of failure:
Fuse: No. 5, terminal 15;
Fuse: On N7, exterior lamp failure monitoring unit (in relay casing at back of engine bay, relay code K);
Connections: Anywhere in the system;
CC Harness: Part A 124 440 20 09 (connects main system components);
Secondary harness, brake light switch to bi-connection: Parts A 124 540 24 08 and A 124 440 99 08;
Tempomat stalk switch + cable/connector: Can't find part number for this?
B6 Hall-effect speed sensor: Part A 007 542 29 17 (sits on back of instrument cluster);
X53/5 Hall-effect, multiway connector; Can't find part number for this? But only needed if more than one vehicle system needs to use the H-E sensor. I have one fitted (fixture at back of instrument cluster void);
N4/2 CC Module: Part A 124 545 51 32 (mine sits mounted at rear of engine bay, passenger side, under its own flexible cover, immediately behind battery);
M16 CC Actuator: Can't find part number for this? (Mine is attached under the manifold intake cover);
Linkage, actuator to throttle: Can't find part number for this (attached to actuator).
My first question is could some tell me either (a) where on the EPC I will find the parts which I haven't been able to find specific to my VIN or (b) the part numbers for the 4 I am missing, stalk switch (+cable/connector), X53/5, M16, linkage.
Second question is two-fold: what is the logical and most efficient testing sequence for fault-finding? Will the main components show up with a blinking diagnostic reader?
I have a working external temp gauge, which I think means that I have no issues with B6 or X53/5.
With a full bank of parts data and advice on method, I will investigate, including cost of MB supply v breakers.
Cheers,
Jens
Cruise control on my car has been U/S, since I got it back in October. It is next on my list to restore to working order. I will then only have 3 main issues, apart from a list of largely cosmetic cabin and trim parts, which I'll do gradually, (1) o/s heating & A/C issues (prob. matrix), (2) underbody mechanical inspection & overhaul, and (3) bodywork, including new wings and load bay side window trims.
On the CC there is no response at all from the stalk control.
I am on the EPC so have a good idea of the exact system. My car was a pretty late model, leaving the factory on 17 November 1995 (with free factory A/C). I have a CC-specific wiring diagram and print out of drawing and part list from EPC. This thread won't therefore be too much use to owners of earlier 124s because late models have very different layouts of the CC system (see my control module below).
It is the ISC (Idle Speed Control) Type, without ASR (traction control). Confirmed direct by MB.
My understanding is that the following components are all capable of failure:
Fuse: No. 5, terminal 15;
Fuse: On N7, exterior lamp failure monitoring unit (in relay casing at back of engine bay, relay code K);
Connections: Anywhere in the system;
CC Harness: Part A 124 440 20 09 (connects main system components);
Secondary harness, brake light switch to bi-connection: Parts A 124 540 24 08 and A 124 440 99 08;
Tempomat stalk switch + cable/connector: Can't find part number for this?
B6 Hall-effect speed sensor: Part A 007 542 29 17 (sits on back of instrument cluster);
X53/5 Hall-effect, multiway connector; Can't find part number for this? But only needed if more than one vehicle system needs to use the H-E sensor. I have one fitted (fixture at back of instrument cluster void);
N4/2 CC Module: Part A 124 545 51 32 (mine sits mounted at rear of engine bay, passenger side, under its own flexible cover, immediately behind battery);
M16 CC Actuator: Can't find part number for this? (Mine is attached under the manifold intake cover);
Linkage, actuator to throttle: Can't find part number for this (attached to actuator).
My first question is could some tell me either (a) where on the EPC I will find the parts which I haven't been able to find specific to my VIN or (b) the part numbers for the 4 I am missing, stalk switch (+cable/connector), X53/5, M16, linkage.
Second question is two-fold: what is the logical and most efficient testing sequence for fault-finding? Will the main components show up with a blinking diagnostic reader?
I have a working external temp gauge, which I think means that I have no issues with B6 or X53/5.
With a full bank of parts data and advice on method, I will investigate, including cost of MB supply v breakers.
Cheers,
Jens