71 00... Notes on retrofitting a trailer towing device
Starting with delivery of the E90, in certain vehicle types, the size of the electric cooler fan will be linked to the optional extra trailer tow hitch or trailer provision.
A larger fan may therefore be required for retrofits.
The larger fan is necessary to ensure mountain driving with a full trailer load in accordance with BMW-internal specifications. Otherwise the engine electronics will detect possible overheating of the cooling system and activate protective functions.
For the customer, this involves impaired A/C output, automatic transmission and engine power. These will be continuously reduced, which in the end may result in the vehicle coming to a standstill in the mountain area.
71 60... Replacing complete trailer tow hitch
| IMPORTANT | When retrofitting a trailer tow hitch, it is absolutely essential to read and comply with the NOTES ON RETROFITTING A TRAILER TOWING DEVICE . |
Necessary preliminary tasks
- Remove rear bumper trim
- If necessary, release exhaust system suspension elements
Release screws (1) on both sides.
Unclip cable from fixture.
Remove trailer tow hitch support member (2).
Disconnect all plug connections.
Tightening torque 71 60 1AZ .
Scheme 209
Installation
Only vehicles up to production date 07 March 2005
Knock out studs (1) towards inside and replace with M12x40 hexagon bolts.
Tightening torque 71 60 1AZ .
Scheme 210
36 12 084 Replacing sealant bottle of M-Mobility system
Recycling
Observe country-specific waste-disposal regulations.
Raise luggage compartment floor at rear.
Remove M-Mobility system (1).
Remove sealant bottle underneath.
Scheme 211
Check expiry date (1) on sealant bottle, replace if necessary.
